I would like to put a battery maintenance charger on my Honda 500, like a 1 1/2 or 2 amp charger, with a lead mounted on the battery with a plug-in. I would leave it plugged in when not being used, then unplug it when I use it. The lead left on the battery would need a cap so it would not foul up, or short. How would I do this with the battery in a box? Is there some access hole that a lead could run through? What type of charger would work best?