Both right and left Angled Valve Index Base Station Wall Mounts for use with 3M Large Command Strips. (https://www.command.com/3M/en_US/command/products/~/Command-Large-Refill-Strips/?N=5924736+3294529207+3294773680&rt=rud ) to save from drilling holes in the wall. Each Large Command Strip is rated to 5 pounds, so it should be more than enough to hold the Base in place.

Quoting the original description on Thingiverse (Angled Valve Index Base Station Wall Mount by Phantom329 - Thingiverse ):
"This is a drop in replacement for the Valve Index wall mount. It is angled 30 degrees so you can point it at your space easier. You should use the stock ball mount from your base station. The thread is M20x2."