Installation was a little tricky. Had to use screws with a washer head and slide the lights down over them. Applied sealer all around the perimeter so that should hold them in place.
I was looking for some larger and brighter lights for the back of my fiver. The stock lights are lame and they leak to the point that the bulb contacts have rusted and I replaced the bulbs each year.
So far I've only found ones that have bolts out the back when searching surface mount lights. Most of the lights need a cutout that I've found.