then the O2 sensor, the B+wire should already be done, so only the E1, HT, and OX wires left. you should use a shielded wire for the OX, this is like a braided metal netting that goes around the wire and keeps there from being any "interference" in the signal to the ECU. only thing is, you need to connect the shield to the E2 wire down by the ECU. if you bought a sacrificial harness, find out which wire is shielded and use that one. i will cover the "E1" wire later under "ecu grounds".