Metal tube-and-connector systems for customizing the interior of a vehicle, namely, vans, trailers, and trucks, the system comprised of metal tubes and connectors; aftermarket automobile accessories, namely, car interior organizer bags, nets, and trays specially adapted for fitting in vehicles, namely, vans, trailers, and trucks; aftermarket automobile accessories, namely, attachable bed supports, counter tops, shelving, and storage units specially adapted for fitting in the interior of vehicles, namely, vans, trailers, and trucks; locking mechanisms and hooks specially designed for attaching accessories to the interior of vehicles, namely, vans, trailers, and trucks