Freespeak II to RTS (wireless comms to wired)

Anyone have a link they can share that'll walk me through this step by step? I've done it before but being that I don't have to do this often, I forget some steps and it's always much harder than it has to be. It isn't difficult to begin with but I always get thrown when it comes to linking the two system via 2 or 4 wire.

Thank you for your time!