I print the parts individually to prevent support material requirements but feel free to assemble them.

I use Rubbermaid garage slant walls for tool mounts and I have another part posted that explains to check the printed adapter against your slot to make sure it will fit because I have found my slant wall slots very which means I have to adjust my printed model from time to time.

Remember, the long tab on the horizontal mount faces up (the bottom is shorter the the top of the slot. If you look at my other post for just the adapter, I have a picture showing the side view in one of the photos.