1990hondaHF

I'm helping my friend install a turbo and we need to tap into the ignition wires for the electronics. There are 5 wires on a large single clip that look to be what we need(we only need 4 of them)....problem is that I have no idea what wire goes to what and the instructions SUCK! I've searched for, "pinout, wire, wiring, ignition"...and others....what wire is what? HELP!