yep, understand why they are there. Curious if people with caps that dont leak plug them. I dont think much water would get up there, but if I had a plate, it wouldnt get much chance to dry out either.some truck beds have drains between the floor and front wall. in an unloaded (and uncovered) bed, the tail is a little higher than the front of the box. when loaded, water will drain between the bed and tailgate.