Hello Aschaadbittig, I haven't mounted the holder on the wall because I don't have a suitable place for it. I just plug the charging cable into the vacuum cleaner as needed. So the holder doesn't necessarily have to be mounted. However, if you want to mount it, you have to drill holes with the electric drill and dowels etc. for solid walls. With wooden walls, it might be possible to do without, but it never hurts to pre-drill (depending on the type of screw).