Prefacelift loom conversion help urgent please

[MrHines]

Converting my 83 320 to facelift b25,this is all I have left and then I can hopefully drive it. I've wired up the round plug to the old square plug, that's sorted. however the car has the small white square plug that did go to the engine loom next the ecu. where do I wire that into on the facelift loom?

[Brianmoooore]

The wires are in the round C101, but are also in the engine loom where it comes out of the ECU, so the easiest way for you to do it is to cut the small plug from your old loom, with as much wire as possible, then find the wires in the loom near the ECU, cut them, and splice the ends that come from the ECU to your old small plug.
What colour are the wires in your small plug?

[MrHines]

The wires are in the round C101, but are also in the engine loom where it comes out of the ECU, so the easiest way for you to do it is to cut the small plug from your old loom, with as much wire as possible, then find the wires in the loom near the ECU, cut them, and splice the ends that come from the ECU to your old small plug.
What colour are the wires in your small plug?

ive got a small black which I believe is for rpm
then a thick green in the middle
and finally a thin brown and yellow
thank you

[DanThe]

RPM, Ignition, Fuel rate to cluster

[Brianmoooore]

RPM, Ignition, Fuel rate to cluster

RPM is black in both looms, fuel rate is brown/yellow on old loom, white/black (not black/white) in facelift loom. Ignition (green) isn't needed, since that's also present in the C101.

[MrHines]

Thank you guys, appreciated big time