Several Questions about MC Cthulhu+IMP

Hi! Im new posting in SRK! Hope that we talk much arround here! (First of all: Im spanish and i have a very limited english xD)

I have several question about using a Madcatz360 PCB and MC Cthulhu (MC in advance) with the IMP, i watched a few post of wire setups of these PCB, but i see diferences:

I want to use this combo with a modular-cable system using a RJ45 neutrik and i have this scheme ( ignore the USB soldering in the IMP, i have clear that i have to solder de RJ45 cable):




But in this i dont see de conections between de MC and the IMP, i think this is and incomplete scheme, can anyone tell me a good scheme for my idea? Thx!