According to specifications, you have a residential GE refrigerator and an inverter to run it from 12 volt batteries when shore power or generator power is not available.
Since you know you have a Samsung refrigerator, that tells you what Dutchmen specifications are worth.
You should have received an owner's manual when you bought the 5th.
https://www.dutchmen.com/resources/m...22_7-16-21.pdf
The problem is Keystone/Dutchmen/Kodiak manuals are useless. It is too late for you to buy a better brand.
You should also have received a stack of appliance manuals when you bought your 5th. In that stack there may be an "inverter" manual. Most inverters will have a remote "on/off" switch or panel. The manual may show you what it looks like.
I would need make and model of the inverter to look up the manual on-line for you. Large inverters are usually located near the battery bank, but not in the same compartment. Small inverters like you probably have for the refrigerator may be located near the refrigerator.
The inverter may be combined with the battery charger/converter. Check the charger/converter manual for combined inverter.
If necessary, take pictures of electrical controls and equipment. Include pictures of battery bay and other bays that include electrical devices.