An electrical unit and method of assembly that includes a base housing having a plurality of sides and an opening in one of the sides configured to receive a wire therethrough, and a cover configured to mate with the base housing, defining an internal chamber therebetween. A power distribution box is disposed within the internal chamber, at least one electrical connector is disposed at least partially within the internal chamber, operatively engaging the power distribution box, and extending through the opening, and a universal sealing plate that is selectively mountable on each side of the power distribution box and mounted to align with and seal against sides of the opening and at least a portion of the electric connector extending through the opening.