My F450 running 4S and original 8x4.5 props with GoPro and a 5.8GHz 200mw FPV setup. I use a separate 3S pack for the transmitter. The Naza is mounted between the plates.
Here's my setup. When the GoPro is mounted I have one battery on the middle of the top plate and one the behind it. Without the GoPro mounted I mount the batteries opposite(one forward, one middle) (they sit lengthwise left to right on the frame). Plenty of space to mount the FPV equipment, I just haven't moved it from the glider yet.