Might want to talk to someone about the base PN just to be sure, there are two listed in the 2012 parts catalog. After 5 minutes watching the parts guy make weird faces at his computer he concluded one has the circuit board with the connectors and one doesn't, or one is the circuit board. It was a bit confusing. My receipt was for 73380-12.
For the hole at the bottom of the fender I used a chrome button head screw and a nut on the inside.
Here's a teaser pic: