My CB500 came without a grab rail or rear turn signals. I've sourced both and there's what appears to be a ground wire on the little tab where the turn signals mount. Unfortunately, someone just snipped the wire off. There's enough left to splice in or add a "hoop" connector, but where does the wire go?
I don't see anything obvious in the wiring harness. Maybe a "hoop" connector behind the bolt that attaches the grab rail to the fender?