Game Boy Advance SP USB-C & Audio Kit (Installation)
Channel: Alberto Gil Tesa
Date: 08/06/2021

Blog: https://giltesa.com/en/nintendo-usb-c-charging-kit

Thanks to these makers for publishing the information about the pinout and their experiences, it helped me to make this board:

ishoug: http://www.ishoug.com/diy/116/
666Gothicgirl: https://www.youtube.com/watch?v=5_2sGFCsaPw