Here is the Description from the original model.

The Google WiFi does not come with an option to wall-mount the units. No mount, no screw holes or anything.
I wanted to wall mount the base unit at the same spot where my old router was mounted, so I made a thing!

This hanger is very simple. It is a small shelf for the Google WiFi unit to sit on. The shelf is mounted to the wall by hanging it on the power adapter. The power adapter is plugged into the wall through the wall-mount. The wall-mount will not come off the power adapter since the power-cord is blocking it. But since the hole for the power adapter is a little oversized, the mount will tilt forward a little. I solved this by securing the mount with a zip-tie around the power adapter.

This mount will only work with a horizontally mounted power outlet. Hopefully I will get some time to make one for a vertically mounted power outlet as well.
There is some room behind the Google WiFi unit for managing the power cable and network cables, but i recommend not using this for much more than the power cable