348 O2 sensors loom wiring colours?

Basically I need to know what colour the wires are that come from the ecu on an early 348 and to what colour wires they plug into on the O2 sensors. This is so I can wire mine back up. Someone has removed the plugs and without this info I'm knackered! My car is a 1990 with the bosch 2.5 Motronic system on it.
I have researched the sensors and now know the function of every colour wire. I just need to know what wires come from the ecu and what each colour wire is for.
Anyone got a early 348 wiring diagram? Failing this anyone with a 2.5 equipped 348 could have a look at their wires and advise.

Hope you guys can help.
Regards
Danny.