CrzystghndKC
Triumph guy happy he didn't work for Harley.
Whomever worked on his bike has gone where no man has ever gone before.That wire is for the blanked out part on the switch block that on other models (non Rocket) have a switch in place to turn the lights on and off.
There's something very strange going on with a neutral at the bottom of the range, I can't see it having anything to do with clutch cable adjustment.