A vehicle includes a truck bed side panel, a docking plate, an E-track, and a clamp. The truck bed side panel has a top surface, a side surface, and an overhang extending from the top surface. The docking plate is secured to the side surface and defines a keyway. A keyed protuberance extends from the E-track. The keyed protuberance engages the keyway and secures the E-track to the docking plate. The clamp extends from the E-track and engages the overhang to secure the E-track to the side panel.