I've got the factory roll bar out of the truck right now to mount lights, run wires, and repair a cracked right wheel well. My question is.... the bar has 3 tabs welded on top. The outer two fit your standard 6" spot light. The center one is much smaller diameter. What was meant for that hole factory? I've been told smaller rear facing light or cb antenna. Anyone know for sure?

Just a guess, mine had the factory cb radio in it and had wires run up the roll bar for a whip. Kinda wish I still had the factory cb radio for it.