Umm, it's been a while since i did this, but i'll try to remember... I think i just mounted them to the underside of the bumper, or whatever is right above the back side of the bumper there, after making sure i wasn't going to drill into gas tank or anything! I cant check up on this more closely if you still have questions. im pretty sure i started by drilling a hole, then using a jig saw or small air saw to cut the holes, finishing it off with a file. the lights i used are just a set of optilux (made by hella) foglights that i had from my last car. i think any foglioghts would work though. let me know if you have other questions.