bolted54,
I will say probably anywhere, but the guru's will probably shoot me down. If you are still using the stock ammeter, tie the hot side of the voltmeter to one of those 'big fat' wires, while the ground can go to any clean, shiny panel, frame, engine, or even the BATT negative itself.
There is no current flow with a voltmeter. It's merely taking the pulse of the system, and theoretically, that pulse is the same within the entire system.
Stuart
