This base has four 11x3mm cavitys for 10x2mm magnets on the backside.

To watch our powermeter via "ai on the edge" firmware on the esp32-cam modul + green USB micro breakout board, I needed a flexible but sturdy solution to get the position right.
With this base you can still move an roll the cam modul in your metalic electric cabinet. ... or maybe even on a car?

I recommend to print with supports for the cavitys. The model has been designed in sketchup (*.skp file is also available as download)
The magnets can be super glued, or (like in my case) put some tape to avoid scratches on the magnetic surface.