That's how I do it. Works great for me! I've since added another set of female banana plugs to my box that are connected directly to the battery. That way I can plug my field charger in without having to unplug my starter (how lazy is that?). I guess you could do this and charge through those leads, but you won't hurt your field charger by charging through it. Just be sure to hook the charger into the jacks for your starter.