This shows the stainless box which doubles as a seat mount.  The box spans the floor of the Jeep and contains things such as winching gear and welding cables.  The base of the seat forms the lid to the box.  It has a large hinge in the rear and and a pin in the front to hold it tight.  You can also see the ice chest with the matching upholstered top which mounts to the box as well.  It is stainless double wall with insulation between and a drain...it'll hold about a case of cans.