You'll need SATA power (from the PS) and SATA data (to a free SATA port on the motherboard) connected to the new SSD.
SATA power leads should already be in place (just need to find a free port on one of the leads - to plug into the new SSD).
As long as the motherboard has a free SATA port (most have at least six SATA ports), you're good-to-go.