Last time I posted this info it was met with dead silence, no responses. No one seemed to care, but I feel your pain as ours opened up while traveling and dumped most of the contents.
Thor installs a latch as standard equipment, simple to use and very effective. It does take two screws as you take out one and the other goes in the threaded latch hole. It is an odd thread a #12 x 3/4". take your threaded rod to match up.
The latch is available through Thor distributor TOTAL VALUE RV ELKHART INDIANA 1-574-262-4460. part number tfm3293 lock refer travel, 16cf & 18cf, steel, pc black. The lock is only $7.41 with shipping total of $21.03. Worth every cent. to us. It is designed by Thor for this refer and they control shipping cost.
Tara is our Border Collie daughter.
2014 Winnegabo Forza 34T
Dragging a 2015 Cadillac SRX, very nicely!