You can add the door latch, metal will last longer. Best way is to hold the slot piece on the door at the lower edge, open the door and make sure the hook doesn’t interfere with anything.
If you look at the exterior J wrap, the top edge that’s tucked into is called the belt line. As a rule it’s solid just above it and if it coincides with the door frame you should be okay. If possible at least 2 of the screws in the door should be through the frame since the door is just styrofoam with a metal frame.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.