[rbar]

Yep, your current mirrors are in the "wrong spot" and the other three are factory. Mine doesn't have any mirror mounting spots on the passenger side either. I am thinking about using nutserts for that instead of trying to put nuts on the back side. They work really well and were a great fix for my cowl vent holes where you can't get to the backside. We use them at work all of the time. The flange is really thin and they hold strong. You do have to have the install tool with it.