Groupwise,
Glad you found the AC plug in on the back of the Power Distribution and Circuit Breaker box......I had my Converter/Charger come unplugged a couple years ago. It happened while I was fussing with wiring under the Step up to the Bedroom.....Nest thing I knew my batteries were dead. Took me a while, just like you to find the AC socket. made sure it was snugly plugged in and No problems since. I have increased the wire size gauge on all wiring under the step access area and I have soldered all terminal lugs under there as well....Reducing voltage drop on all 12 volt wiring is always a GOOD thing.
GARY