So I’ve searched for couple hours ....I haven’t found a straight answer ....ok two wires come from the switch....this is where I get conflicting stories....I’m told that one of the two wires will be hot the other becomes hot when switch is in reverse .the only thing that makes sense to me is that one wire goes to acc and the other goes to the light that has its own ground....true or false ? I was told there should be a third wire lol