Ok...I have extended the wires(A4=Vtec Solenoid,A20=EVAP Purge Solenoid,A17= IAB Solenoid,D3=Knock Sensor,D6=Vtec pressure.) and everything but after i have them run through the firewall i was going to wire them to the pinouts for a OBD1 p72 and i noticed that the chassie harness already has wires in the Plug that clips into the ECU. I know that A17 can be wired to A20. But for the rest of the wires do i just tape into the existing wire thats in the Plug already or do i have to pull them out and move them so the new pins can go there? thanks for the help. much needed.