I mounted my AMS on the wall using cheap brackets from the hardware store.
https://www.obi.de/regalboeden-moebelbauplatten/obi-konsole-eris-weiss-300-mm-x-350-mm/p/8650608
With these slots, up to six build plates can be stored under the AMS to save space.
The small strip of double-sided adhesive tape is not necessary, but prevents possible slipping.
Removing the brim was a bit fiddly, but unfortunately without the brim I didn't have sufficient print bed adhesion.