Mine has a clip for the foot pedal on the lid, a side tray for random accessories and the manual, according to the manual the small green box with accessories goes on the bottom left on a wooden ledge and the clip on the top left was for an oil can. Mine is a 1952 according to singers site.
I didn't know there were different types and had seen some with trays and thought mine was missing it too but since the manual made no mention of it I didn't think much of it. Good luck!