I have a 1992 Bayline 1950 with a 4.3L serial number OD720478. I removed the distributor last fall to replace a broken brass nipple for the oil pressure sensor. When I removed the distributor, I separated the cap from the base, and removed all wires going to both. I labeled everything but, for some reason, there is an unlabeled black wire that is connected to the vent on the cap. I believe it would go to either the white/green or white/red connector on the base, but unsure which one, if any. Any help on this would be greatly appreciated! Thanks!