The 4x2 SnapBoard is almost exactly the same size as a 4x3 gridfinity bin. This model is an adapter - it can be attached with M2.5 nuts and bolts (10mm) to a SnapBoard to make it fit onto a Gridfinity baseplate.

A pause should be put into the print after slicing, immediately before the layer that closes off access to the pockets for the nuts. The nuts are pressure fit into the slots, then the print can continue. M2.5x10 bolts fit through the holes on the SnapBoard, through the holes in this adapter, and into the nuts to hold the adapter on the SnapBoard.