While my trailer is older, I have the same bulkhead between the credenza and fridge. I've also removed the bulkhead in the past to service the fridge and there is something you should know about it.
It may look like it is 1/2" or 3/4" thick, but don't be fooled. Mine is of a sandwich construction, two pieces of paneling with a cardboard honeycomb core, on the top section where it is visible from both sides (living room and inside the cabinet). This sandwich construction is also on the vertical edge that you see when facing the fridge, but this thickened portion is only a strip several inches wide. If I explained this clearly enough, if you removed that panel, the side that faces the fridge, the thickened portion is P-shaped while the rest is only the thickness of a sheet of paneling. Of course my trailer is older but I doubt those bulkhead panels are more robust now.
My point after all this explanation is that you will certainly need a backing plate. I suggest gluing the thickest piece of plywood on the backside that will still allow the bulkhead to slide into place. You really need to pull that panel out to see what you are dealing with before proceeding.
Christopher
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