Laurence wells

Hi! Hoping someone on here can help me out. Got a manual lexus is200 that im cutting the original wiring loom down on, just want the wiring that runs the engine. Does anyone no what pins i need that do the power and earth for the ecu and the 2 wires that connect up to the key reader? Got rid of all the other wires but its these last few i cant find and looked round on the internet and cant seem to find anything