White cloth-covered coil wire? 65 C10 292

[theastronaut]

There's a white, cloth-covered wire on the positive side of the coil on the '65 C10 I restored. It's got a 292 in it, if that makes any difference. The new repro harness doesn't have it and the wiring diagram doesn't show it either. If I remember correctly, it was wrapped up with the original wires in the wire wrap; could be wrong though. Anyone know what its for? Thanks in advance.

Here's the new harness. The green wire that goes to the starter is yellow on the original harness and also yellow in the wiring diagram I found.