This is a remix of ZGOFFs (Thingiverse) Ryobi One+ 18v Wall Tool Mount Holder for the Multiboard by Youtube's Keep Making channel. It uses two big thread flat head bolts.

The original model used screws to mount the tool to a plain wall.  My remix increases the size of the back a little bit and adds two mount points for multiboard big thread flat head bolts instead.

I printed this with the flat base side down and no supports, for a heavier tool it would be advisable to print it on the side. You would need to support the two battery indents. You should not need support for the mounting holes. This would provide for a much stronger part.