The creator (SkeletonEarth2) of the HSW Storage Bins designed them for a wall that was rotated90 degrees. This adapter allows you to mount them to an unrotated wall. It takes up the width of 3 honeycombs and is intended to be use with M3 heat pressed inserts and M3x8 screws.

I printed these in ABS with default 0.4mm settings on a Bambu Lab P1S.