Thanks for the quick comeback!
That's what we were thinking but we can not trace where the wire bundle connects even after starting to the remove master cylinder. We (a friend is helping who has an electrical engineering background and a couple of motorcycles) also figured if it were a ground it would probably be grounded to the chassis instead of running back to the battery ground. Alllso, it looks like one of my heat shrink jobs. Not bad, just not factory. It's been so long I can't remember. I did a lot of electrical work on the bike back in the day which I removed.