I need to pass the wires from my gps through the dash. The instructions just skate over this process ( mount the unit and connect the wires ) I think they forgot that very expensive fiberglass that separate the components ... OK , Does anyone have a way to make that hole look net ? I am thinking like a 3/4 sj connector or two 1/2 inch sj connectors . I have to get the manufactured plug and the antenna through the fitting.