simple {expletive} buy the kit pullt he headliner out,,look for the marked holes if its on a dodge 2500 and you can use it as somewhat of a template but if yours doesnt have it no big deal just place them where you want andd where it looks like the factory position drill your holes silicone them if you are leary of just the gaskets they give ya in the kits,,run your power wire to each and then down your pillar and most of us tap into the parking light wire in the switch and just use the factory switch instead of a sep switch for them.Easy stuff 30 mins and your done :bigthumb: