We have been campers for many years but have now invested in a caravan- Bailey Ranger 510/4 2004. We used to -in our folding camper- plug in the panel via a 2 pin plug and (don't know how) it put a trickle charge in the battery. Please could someone explain how does this proceedure work in a caravan? Do we connect the panel directly to the battery (if so how in that tiny space allotted for a battery) or do we still plug it in or what? Many thanks, Gary