J 408

Again more questions, does anyone have any pictures of the battery hold down on a model J ? Or have info on who may reproduce them? I need just enough info to make them, the pegs sticking out of the inside ends of the battery box are really throwing us a curve, having a hard time imagining how they fit into the big picture, I recently visited several museums that had Duesenbergs but was unable to look inside a battery box, it's like there is gold or something stored there. Maybe they just lost the key.