A storage compartment assembly is moveable between an uninstalled orientation and an installed orientation in which the storage compartment assembly is directly fastened to a side wall of a cargo area. The storage compartment assembly defines an opening along an upper end thereof providing access to the storage compartment. A lid is pivotally supported to the storage compartment assembly by a hinge mechanism. The hinge mechanism extends in a direction parallel to the side wall with the storage compartment assembly in the installed orientation. The lid is movable between a closed orientation covering the opening and concealing the storage compartment, and an open orientation uncovering the opening and exposing the storage compartment. The lid contacts the elongated support projection in the open orientation such that the lid is supported by the elongated support projection.