Pictures with explanation
The grey/white dots wire that has faded to a brownish color with white dots for the start solenoid on top of the fuel filter is correct according to the 1971 911S wire diagram. The black/white wire that sticks out from under the electric panel I am not 100% curtain of yet, but I think it might be for a two stage rear window heater. I think the red wire with white twist connects to the red wire with red dots(a bit strange that the wires are slightly different).
John