Depends on how your current wiring is set up. There's nothing special to do as far as the MoCA network itself is concerned, it should just work. But the TA probably doesn't pass-through the MoCA signal, so if you currently use the TA's "RF Out", you'll want to stop doing that.
You'll want to set it up this way, if it's not already. Any 1000MHz (1Ghz) or better splitter will work: