I purchased a used Jayco popup, I believe to be a 1206 model, guessing mid 90's. I bought the unit to keep on our lake lot. the gentleman we bought it from used it for the same purpose and did not have a title. I have searched all thru the camper and cannot find a area that might have been used for the battery or battery hookups. Was a battery set up optional on some of these models? It seems to have nice options like bathroom/shower, seems strange not to have a battery system to run the 12 volt lights/fridge. Everything works fine when plugged in to Shore Power. I would like to install a battery for back up. Is there anything I need to do to the power box to accommodate this? I am thinking as far as hooking the battery into the existing power box. Nothing is labeled in the box and I am not sure the box is even set up to have a battery backup system.