That is the correct look Jack, they were actually produced (or similar versions into the 1970’s) simple stampings, very cost effective for GM. I have heard they were in a bag of some kind (never seen one) most people think they were loose under the seat. I have also never seen AD period original instructions on storage provisions.
https://www.flickr.com/photos/advance-design_parts_co/8129502216/in/album-72157631868452754/
One of two I have found in trucks, one in a ‘49 one in a ‘53.
https://www.flickr.com/photos/advance-design_parts_co/16079459486/in/album-72157631868452754/
The two handles, ‘53 version was shorter.
https://www.flickr.com/photos/advance-design_parts_co/16105224175/in/album-72157631868452754/
Extended view.
https://www.flickr.com/photos/advance-design_parts_co/45119759105/in/album-72157631868452754/
Documentation is Yeti like in its rarity.