Thanks for the replies. I still haven't figured this out. My normal MO is just throw stuff together and then go to forums to unscrew my work:D I'm trying to do this a bit more professionally, I'm installing, auxiliary lights, heated grips and HBD handguards and only want to do things once. I mean I even bought shrink tube and have been soldering instead of twist and tape for Pete's sake!
I have some time today, so I'll try and figure out the ground wire and post my findings here just in case some other mechanical electrical noob does a search