i downloaded the templete online. i then cut out the hole on the paper, placed masking tape on the fenders. I then traced the outline of the hole on the masking tape. after i was happy with the hole on the masking tape I grew the balls to take a cut off disk on my dremel to my fender and cut out the whole piece by piece. I removed little by little to make sure i didnt remove to much then wired them up to my marker lights. Hope this helps