[Drifty1]

Looks like the 1/8” plastic shell has pulled free from the framework around Pinbox. I would try a little longer screw first and if that would not hold it up I would try one of two things. First your could get the next size larger screw as the original one is stripped. Or you could move the screw over a little bit to allow a new hole and silicone the old holes. You should be able to push up on the skin to see how much force it takes to hold it up. My trailer has a wood strip stapled to the underside of the floor to allow wood screws to be used for part of the screws and this strip can pull free from floor.