I can't be positive the holes are pre-drill holes or it there were screws once upon a time (its way back, so can't get up close and personal). However, my guess is its just pre-drill holes as there doesn't seem to be any tearing (lack of loose screws doesn't mean a whole lot as I'm not the orign owner). There really needs to be more brackets and or better brackets in these things. Fortunately, that's a nice clean, easy fix (not like changing that damn water pump). I suppose these things happen when it comes to custom apps (even three of the four gaucho seatbelts are too short to use, which should have been discovered before it ever left the factory). Here's the cabinet:
I needed to go in and make things extra secure anyway. I might be using that general area for a support for a TV mount (not sure if I'll build a support bracket that goes from the counter top to the steel PH top roof reinforcement, or perhaps a bracket going from the floor to the van roof reinforcement (also screwed to the cabinet side). Perhaps I can find a piece of scrap Corian to swap out the current countertop while I'm at it.