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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@fanoush
They have pinout here https://www.walmart.com/ip/USB-Smart-Watch-Charging-Cable-Magnetic-Adsorption-Cable-for-GT88-K88h-KW08-White/5626620486
https://i5.walmartimages.com/asr/d7694e4c-f280-4f1e-9c6e-155649efa41c.7f3ae674814698301a7f3fdc5edaf3e3.jpeg?odnHeight=2000&odnWidth=2000&odnBg=FFFFFF
but it also depend on the magnets - if the correct way would not attract it needs magnets swapped/turned
EDIT: here they also have dimensions and magnet poles
https://www.aliexpress.com/item/1005003121185124.html
https://ae04.alicdn.com/kf/Hf7a8220b6bf347bbb7c93a3ccead6139a.jpg
BTW and they also list it is compatible with "for SMA-Q2, for SMA-ROUND,for SMA-09,for SMA-09S" so not SMA-Q3 but chance is high.