I recently had my cap broken into and all my tools and toys stolen because they were able to force the tailgate open from under the back of the cap. So I purchased and installed the mechanical portion of the lock. I found that with enough force the whole unit would rotate and allow the tailgate to open anyway. So I made a piece of bar to go from one of the bolts that holds the cellenoid to the plate to the handle bolt opposite the one that it mounts to stock, to triangulate the entire unite from rotation. I thought that I took pics, but can't find them. I will take some when I do the wiring.
But wanted to encourage you all to try to force it open as if you were trying to break into your won truck. As this is the force it took to get the tailgate out from under that back window.