This is a mod based on the IKEA LIVBOJ wireless charging pad, for securing and wireless charging an iPhone 11 Pro in the phone box of an Audi S3.

https://www.ikea.com/ca/en/p/livboj-wireless-charger-black-90447058/ 

The 4 screw holed in the bottom was designed for M3 screws.

Can be customized to fit your car and your phone using the f3d file.