Multibin square tiles and connecting a bin shell

So I can see the back of the bin shell is the same size square as the tiles on the multibin tile board. However I am not sure how to connect it, all the details I have found including the packs YouTube videos all show the octogon title not the square tile panel. Looks like the shell has dualpin slots, would I use dualpins for this? not sure why I would add the various screw options to the tile panel when it looks like there should be a more natural interface. My bin is 4 wide and 2 deep and 1 tall and it looks like the only support for it to mount and support any weight is solely on this connection interface. Any options would be very appreciated!