Abstract: An electrical connector and a method of use of the electrical connector during installation of an Optical Network Terminal (ONT). The ONT includes a power supply unit having a pass-through grounding plug. The pass-through grounding plug includes an electrically-conductive grounding prong that is operable to engage a ground conductor of an electrical component. For installation purposes, for example, using existing home wiring, the grounding prong may be retractable, removable and foldable into a body of the plug. When installing the ONT, one would determine whether a power source to which a power supply unit of the ONT is to be connected is within a predetermined distance from an installation location of the ONT. Further, one would determine whether the power source includes a ground conductor. In instances where there is not a ground conductor, the grounding prong may be removed, folded, or retracted into the body of the plug.