You'll have to drill out the one hole on the lights that don't go all the way through. Then you have to sand/grind all of the mounting tabs and stuff off the back of the light. You should also get some weatherstripping tape to wrap around the light, cuz they don't fill the whole entirely. I used the stock screw hole on the car for one side, then I mounted a speaker clip on the other side so that the screw had something to grab on to. Tony, 1clnAltima, did a better job of getting the light flush than I did, but it's the same mounting setup. I didn't spend too much time puttng mine in cuz I was in a rush. One afternoon, when I'm bored, I'm going to redo them.