A wrap of tape around the plug will help, makes for a tighter fit. I installed a set of BMW style outlets on the black panel below the outlet, ran power from the battery. I also installed my Gerbings dual controller switches to this panel with the leads stored in the glove box, I used a rat tail files to make 2 half moon slots, one in the cover, one in the tray. I also keep my Auto Com unit tucked away in the glove box. Allows to me to neatly stow all wires when not in use and easy access when needed.