Question on Sealing Tail Lights

OK, I'm about to the point of installing my surface-mount tail lights on the hatch and I have a quick question. Would it be best to seal these tail lights all the way around the exterior of the bezel, or just around the wire hole and the screws?
My gut says that just sealing up the wire hole and putting sealant on the screw threads should be enough, but I want to run it by you all first.

My gut says that just sealing up the wire hole and putting sealant on the screw threads should be enough, but I want to run it by you all first.