you dont cut any wires, remove the fuel pump wiring, u will need to remove the interior trim for this, pull that right up and out the car along with the cars wiring loom to the engine, along with the ecu. pull all this out through the bulkhead , then its a straight swap back through the car like you took out, (only wire u have to maybe join in the car is the black earth wire if u cut it as it a pain to get into the bolt.) then 2 wire in the fuse box in the engine bay .