[hiccup]

There were some models that had DC only refrigerators. If there's a breaker on the DC panel for it, but not one on the AC panel, then it is definitive that this is your situation.

Just make sure your battery charger is on and charging when on shore power and the fridge will be indirectly AC powered. Not the best design IMO but it is what it is.

You could always wire up an AC power supply on a new AC breaker and a simple 'logic' board with a relay to convert it to an AC/DC fridge where it automatically switches to the AC power supply when AC is present.