When I got my Ecu, It had an extra set of plugs with it. The ECU had a Cut harness on it but my harness on the engine was completely intact. Well I had to send the ECU out and I did and it got lost in the mail :icon_evil, I found ECU's for sale but None of them had the wires that came with mine. Im not sure if you need them or not. Did I need the Wire/plugs that were on the ECU? Here is a picture of what Im explaining