Outside Fridge Compartment Door Lock
Try the infamous “751 key”. The most common key number on the planet. A quick search with google, and there you go. No mystery, sorry.
(And no real security, either. It’s a common key in the RV industry. If you are real paranoid, unlock, then change out the locks to something more secure. )
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.