On our van there is a place to plug the TV that consists of a 3 pin socket (for mains) a 12volt point for running on leisure battery and an aerial point. it is a fixed bed van with a tV bracket arm on the facing wall.
Mickarooney, perhaps you could get an adult to take you down to a large caravan dealer to have a look around inside a few vans. I'm sure that you would enjoy this.
mel