A very tight fitting snap-in bin for your Multiboard's push-fit (hex shaped) connectors. I made this quite snug so the first few times you go to take it out, you do have to wiggle it quite a bit. After a few insertions and removals, it gets a bit easier but still holds quite well.

There are 2 models: one is ~75mm wide, and the other is split in two (so you have 2 bins each ~37mm wide)

The bottom of the bin is filleted to make it easier to get little things out.

The push-fit-snap connector is based on https://thangs.com/designer/Keep%20Making/3d-model/Push-Fits%20-%20STL%20Multiboard%20Remixing%20Files-994668 to which I added an interference snap to the top, left and right sides.