Personally I am unfamiliar with the charger, however if it is just a trickle charger, it should be ok PROVIDING , you are TOTALLY SURE there are NO issues at all with getting anything connected ie Electricial & Connections WET - I hate to be POLITICALLY CORRECT, BUT to PLAY SAFE I would get an electrician to just check out first,that way you can complete safely .... I use a Trickle charger in my garage and daily check its working ok, Remember anytime you get into the vehicle and then get out , you might need to disconnect terminals and re fit otherwise you might get a red light on your charger and it will not charge up - ( don't ask me why but its an important point to check you light or lights are green and or amber on the trickle charger ) when working correctly.