I'm PRETTY sure if you look on the back of the headlights, you'll see little round nuts of sort on the screws coming out the back of the lights. These fit I believe a 1/4 inch socket, just put the socket on the end and tighten or loosen as necessary. It'll make more sense when you see it.

That's how mine are anyways...I don't remember my stock ones but I'd assume they were the same. All 93-97 lights are similar.