I need to ring the guy but I 'think' you send him the 3 mating connectors off the main loom that hook up to the engine loom and then he incorporates it into the full car loom... need to clarify this though.
Wish I had the confidence to do it on my own and I know a lot of people say it's easy but with no difinitive wiring diagram to work to and as mentioned tried to work it all out from ECU end I just got totally confused....
wish I understood it better but I don't so pre-made it will have to be
How difficult would it be to create a custom wiring diagram as per David's in another thread?