You have to remove the whole panel at the right end of the storage compartment, a pain.
WARNING:How to kill a converter. My tank heater switch accidentally got turned on & I didn't notice when I parked it without shore power. Ran the batteries down to zip in a short time. Not realizing the switch was on, I hooked to shore power to recharge the batteries. The excess load of charging and the tank heaters on over amped the converter & it fried.
That switch in right next to the water pump switch & the same red color, so it's easy to mistake for the pump.
I disabled it at the breaker under the stove to keep this from happening again. Also, now I use the battery disconnect switch if parked with no shore power.