This is a remix of the Talenti Wall Mount to instead allow mounting to a 2020 extrusion.
There's a little shelf on the back that the M3 T-nut will sit on at the right height for the socket head M3 bolt.
I'm using these T-nuts: https://www.amazon.com/gp/product/B07F75DMHF?tag=tv-auto-20. If yours are different dimensions, you may have to adjust the shelf height.
I used an M3x6 bolt, but anything long enough to reach the nut without being too long will work fine.
I printed at .20mm, 20% infill, PETG.
The author remixed this model.