911SC A/C relay wiring diagram help!
 

I need a little help with the wiring diagram for a 911SC to 911 Carrera. The A/C relay in the smuggler's box has a yellow wire on it. I sold my factory workshop manuals years ago and now need them back! I just cannot figure out where the small Yellow wire goes to or comes from.

The small yellow wires comes from 85 (relay) and connects to the starter wire (50) from the tunnel harness.

Thanks, so energized from the starter.

Actually used as a ground path for the relay coil when starter solenoid isn't picked up. That way compressor doesn't run on start up.
One of Porsche's unique wiring choices... :)