VS 700 R Digital 2 out

Hello,
 
I have since a few days by second hand a VS700 system.. And i'm glad with it.. But I have a question, how do you send a signal to digital2 out?? I wanna send it to an Audient 22, and then record it.. Next weekend i have my first "record gig" and I need 10 tracks to record... Hope you guys will help me.. Greetings.. René from Holland....;-))