where's the converter?

In the meantime - -

You do need to charge the battery. You can use jumper cables from a working RV 12 volt system. You can use a portable battery charger, but set it on 12 volts not the 'start' or boost position. Most portable chargers that have a 'start' mode say to only leave in the start mode for a maximum of 30 seconds followed by a 15 minute cooling off time.

Even a 10 amp charger will fully charge the battery overnight, giving that you might be using 4-5 amps each hour to run lights.

http://www.bestconverter.com/

Good luck,

Fred.

Our old Prowler, it was under the fridge.

Usually behind the breaker panel. I hope someone has a vom.

look around the floor area theres a cover looks like a heat register it should be behind that, , also follow the electric cord into the rv, should be on the other side close .