So after using it i understood it's useless and uncomfortable .
Don't use this as it is.
I am leaving the object her as an idea. maybe someone will fine a way to use it.

Materials needed:

1. Selfie stick
2. M4X30mm Bolt and screw
3. m5X15mm m5X20mm
4. a small spring 6mm diameter.
5. A neodymium magnet 20mmX5mm
6. metal cup 25mm (left overs from IKEA)

Video For connecting the controller:
https://youtu.be/YY4BkP8rSVo

Creality

Ender 3

No

Yes

0.3 mm

20