Just cut a sheetmetal panel to cover it, you are obviously going to be doing other modifications to the bodywork to fit over the motor and once painted you will never notice it. The glass matt batteries are the best, we had problems with the gell batteries in the motorbikes but I think the problems were caused by the way the alternators were charging. Yes I have fitted those on the side and no problems, always wanted to try one upside down but never had the need to do it. They say they will work anyway up
