You people are amazing. I have found the battery. That illustration did the trick. Thanks so much for the responses.
I bought my camper last year and I've been sprucing it up. So many people have offered to buy it from me unsolicited. The younger crowd think I'm hip. I wanted one of these back in the day when I had no money. I plan on keeping this one. This forum is a great place to get info and I'm glad I found it. Thanks again.