Went riding the other night and my phone died. It sucked, because that's what my source of music is. So I as wondering how best to wire in the 12vdc to USB charger that I have. Is there an open spot on the fuse block that I can tie in to, or should I go direc to battery with a stand alone fuse? I have inline fuse kits too, but needless to.say I don't want to kill my battery if I forget to unplug something.