Okay, I just used a red drawing tool in photoshop to show you where 2 screws should go. Just imagine the tire isn't there. You may want to remove the tires in order to drill the holes. Most shops do it this way. Makes installation easier. You will need 2 more in the same place on the front end just behind the wheels. Most companies that sell the side skirts don't give you these screws. You will most likely need to buy some the same size as the ones used on the old mud guards that were removed.
