Steph, he did use JB cold weld to join the two on the advice of the hardware person. Hearing you speak highly of this reassures me about the fastness of the attachment. The door is hinged, but I'd hate to have it bouncing open back there and tools, etc, left along the road like discards from a covered wagon! Thanks

~G Aaron, we have a key and the combined (cold welded) mechanism works now, but on the inside door/latch side of the thing, we see a small hole in the center of the latch where it is set on the lock that looks like it should have a screw to bind the latch to the lock, but we see no threads to screw into. No, I have no photos, but I may try. Thanks to both for your responses! ~G