69 Z10 396 L35 w\console gauges & ac. I just installed all new wiring on my car. Everything is terminated but 1 wire.It is a pink wire that breaks out of the harness "this harness has wiper mtr,starter mtr ect" above the ignition coil.Its about 18 inches long.This harness is exactly the same as my original & when I labeled the old harness as I was removing it I labeled it with "Positive coil ??" Im not sure it was ever hooked up ,that was 7 yrs ago.This wire IS NOT ON THE WIRING DIAGRAM in the AIM. So im not sure any ideas?? Any help is appreciated