[guruerror]

Yep...the OEM ones should have came with little screws (just installed them this weekend). The supporting brackets on the outside of the light should have holes in them for the screws to pass through. You gotta drill four holes in your truck to properly attach them (my neighbors always think I've lost my mind when I break-out the power tools to work on the truck).

The instruction sheet that came with mine said that they shouldn't ride under the tail light (although I guess that would work fine...I would worry about water getting in there though)...the tail lights should remain flush against the body and the angled part of the bracket should fit nicely in the groove between the black plastic edge of the light and the point where the body of the truck bumps back out.