A friend of mine is coming close to completing the restoration on his TR3. His car has gas tank hold down straps that have a metal bracket or plate with a threaded hole in the plate. These are toward the interior of the car. Does anyone know what these additonal plate type brackets are for? My 59 3A just has plain metal straps without the brackets. Is he missing a piece?.....the way it's set up he would have difficulty installing the rear interior panel.