I didn't have mounting hardware, but an abundance of command strips, so this can be mounted to tile with 2 command strips toward the top. Should not require support.
Just beware that adhesives like command strips tend to fail eventually if under a constant load like this. I cleaned a tile well before installing and it stayed up for about 2 years before needing a new strip.
The author marked this model as their own original creation. Imported from Thingiverse.