Downloading manuals for the products I don't have sounds like a great idea, also I have very limited time. Full time day job, mastering of my album on top of moving from one computer to another and installing hundreds of plugins. It is very time consuming.
 
Anyone who looks on the back of the interface can answer this simple question. It looks like serial port used for printers in the past. Something must be connected to it in order to connect TRS. Look at any pro audio interface and you will see it. I don't understand why there are no pictures of that connector or splitter or box or what ever we would need to connect what we need. I cant find it now but look on the back picture of this [link=https://www.sweetwater.com/store/detail/StuPatch6425]https://www.sweetwater.co..ore/detail/StuPatch6425[/link]

It is a DB25 connector and you would need something like this to plug in:

https://www.sweetwater.com/store/detail/DA88BQ5

It's simply an analog multicable. I agree that a patchbay is a very simple thing, just a bunch of connectors. 750 bucks seems like a lot to spend on one but I can't look in your wallet. I understand your apprehension towards Behringer. This is just a bunch of sockets in a box though. ART also makes cheaper to medium level gear but again, it's just a bunch of connectors.

I wouldn't hook up your mic preamps to the patchbay by the way. Might run into trouble with phantom power etc. But almost every interface has at least one mic preamp at the front so I figured you'd be using that.

vladasyn
Downloading manuals for the products I don't have sounds like a great idea, also I have very limited time. Full time day job, mastering of my album on top of moving from one computer to another and installing hundreds of plugins. It is very time consuming.

You always seem to think others have all the time in the world to answer your endless repetitive questions, the answer to which is often a look at the manual or a google search away though. What makes you think others have the time to hold your bad-tempered hand through the most basic stuff only to be rewarded by being rudely dismissed.

You're blocked. Gooodbye.

The Behringer products are fairly priced and the mike preamps are very nice quality.  Well worth the time checking them out at your local music store and the investment.

tlw, answering is optional. I appreciate you taking time to answer my question or post your opinion. It was noted. Also if somebody already knows the answer, they may as well share it with me and save me some time.
 
The Patchbay does not feel right. It never did. Spending $3k does not feel right either, but I have a day job for something! Improving my studio is what makes me happy. So I may be waiting for the Thunderbolt card drivers and buy MOTU or for Presonus driver update. Thank you for the tip on DB25. This is very helpful. I would not know how to search for it without definition. Thanks.

I've got an old RME BabyFace and it's great. Amazing drivers and solid as a rock. There's a new one now:
 
https://www.sweetwater.co.store/detail/BabyfacePro

Before jumping into something new, why not trying to install the Unsigned drivers from Presonus?
 
There are several places that detail how to do this online.  Here is one:
https://en.code-bude.net/2015/08/19/how-to-install-unsigned-drivers-in-windows-10/
 
I personally got rid of an old Presonus Firepod because the driver did not work in Windows 10.  It WOULD install, then only let me see two channels.  I ended up with 18in x 18out Behringer XR-18.  If you need more I/O there is the X32.
I am OK with 18 channels in/out.  It works well with me.
 
Just my 2 cents.

Cannot recommend RME highly enough. I have been using them since the Hammerfall series - maybe 16 years ago.  I love them.  My FF800 is long gone in the current line up, but they put out new (and super fast) drivers frequently.  

Patm300e, I appreciate the link. This was done over and over (installing the unsigned drivers attempts). I had to reinstall Windows 12 times over this. The only thing I did not do at the end was to install earlier version of Windows 10, which I regret because I got the disk with early version, but then I gave up. It was 2 weeks fight. I am actually not 100% sure that it is drivers signing issue, because it does not work with "Unsigned" mode using your method. Presonus wants to believe it is drivers signing but they don't care much and did not really try to solve it. I had strangers on Toms Hardware and KVR Audio helping me much more than Presonus who is responsible for the drivers. They were sounding frustrated that I wanted to fix it, did not reply to e-mails with reports of what we have tried and were just not interested. They did not even tell- they will personally let me know if they release updated drivers- just told me to check the news section of their web site. The problem is that the driver gets installed, computer sees the Mixer, it even forced it to update Firmware on the mixer, and installed new firmware, but Audio is not going through. Just dead. Somebody suggested that it may be Bandwidth of motherboard. Contacted Asus, their supervisor was supposed to report it to Engineers and get back with me, but they never did. People just disappear when I report this problem.
 
I heard several RME recommendations. It must be good. It just looks boring. And expansive. How is it compared to Universal Audio and MOTU? (wondering). Thank you.