SKÅDIS pegs from their numbers
The tongue enters the slot while the peg is held high, then the whole thing drops a few millimetres: the tongue stays in the slot, the catch drops in behind the board, and the board is captured between flange and catch.
Why the bench cannot do this
A 3D generator builds shape from a sentence, and a tolerance cannot be put in a sentence. Miss by 0.3 mm and the peg is loose or will not go in at all. So the figure may come from the bench, but the part that holds it to the wall is computed here.
Joining it to your model
Download the backplate, then join it to your model in your slicer or CAD tool. The plate and the model are both in millimetres, so they meet at real size.