crzygoat

hey guys i am wiring up a lq4 in a 240sx my question is what is the minimum wires that have to be hooked up to the ecu power, ground wise to be standalone. i know pins 20 and 57 are constant power from battery and 19 is ignition 1 voltage and pin 75 is off/run/crank voltage i just dont know where to hook them up if anyone can help that be great.