steve, you say yer van is tight against the wall. so is mine but i still fitted one of the adaptors that allow you to use an extension lead. i put the adaptor in the battery box and attached it to a short extension, closed the door and then slewed the nose of the van back into the wall. the short extension is about 5 feet and this allows me to access it from underneath the front of the van. been on there permanent for 4 weeks now, only a matter of switching on or off from garage socket to get power to van.