The bolt you're referring to is optional. For my setup, I'm using a strong 3M adhesive between the AAL Light and the fender. Works great, too.Great looking billet! I see on your front fenders there is a small screw/bolt on the outside. You have the AAL light kit and I love it, but what is this little screw/bolt? Not everyone who has the light kit has that little bolt on the outside?