I saw a Poul Cadovius mid century wall unit on 1stdibs that has a cabinet for books or records, and I can’t figure out how the unit will support all that weight, and I looked but i could not find a clear answer online.

I read that the early units are all wood. I’ve seen how right angle wooden supports hold up the shelves and later cado units use metal “arms” and pins to support shelves, but I can’t find how the heavy cabinets are hung.

Design within reach has new cado Royal system units and the instructions online say that a metal pin set 1” into angled holes in the vertical wooden support sticks out some unspecified amount and fits into a hole on the back of the cabinet.

Does anyone have or has anyone seen a wooden cado wall unit system and can tell me how the cabinets are supported?

im thinking it’s a few dowels set into angled holes in the vertical wooden supports that sit in holes on the back of the cabinets, but that doesn’t seem like it could hold a lot of weight.