I wanted a wall mount that allows to change the battery without any problems and a slick look. Most designs around here made this tiny sensor look bulky. I liked twamueller's thing (2617289) but it prevented rotation for battery change and also the sticky tape needed removal to unscrew it.
This design allows rotation and unscrewing without the need to reglue anything.
There is a two hole STL which provides a good mount, but also a four hole variant if you want to go fully bomb safe ¯\_(ツ)_/¯
Use 3mm wood screws to mount it.