Designed for a Mobius 2 action cam used as a car DVR.

I have used a gopro flat adhesive mount attached to my windscreen, initially this one:
https://www.aliexpress.com/item/3M-Adhesive-Tape-Set-Flat-Arc-Tripod-Mount-With-Accessories-For-Sony-As15-As30-NEW/32681458273.html SEE UPDATE BELOW
However I found the 'tripod' mount was difficult to attach and held the Mobius a long way from the screen.
I have made this to make mounting easier and more discrete . The flat back to the circular part is to help printing, as well as to shift the camera as far back as possible.
I designed it to use a screw into the brass Mobius mount, but it appears to snap into place and hold well without it.

I would advise using ABS as PLA will likely soften in a hot car.

Update:
I have now created a lower profile windscreen attachment as an alternative to the GoPro clip mount:

https://www.thingiverse.com/thing:2762237