An enclosure system includes a box with a base and four sidewalls, and a support member having opposite first and second ends and defining a longitudinal axis between the opposite first and second ends for supporting components within the box. A component interface portion is formed on the first end, and an enclosure interface portion is formed on the second end. The component interface portion defines a first connection region for selective connection with a component to be located in the box, and the enclosure interface portion defines a non-circular cylindrical locating region for engagement with a corresponding oppositely formed non-circular cylindrical locating region on the base of the box. The engagement between the non-circular cylindrical locating region and the oppositely formed non-circular cylindrical locating region on the base of the box prevents rotational movement of the elongate body member about the longitudinal axis relative to the box.