I'd like to add a joystick to my mouse like this person did: https://www.reddit.com/r/disabledgamers/comments/6tmnk0/25_button_thumbstick_gaming_mouse_mod/
However i can't seem to find any guide on how to do it. In particular the part where you connect the wires.
I found this guide, i dont know if its what i need: http://www.instructables.com/id/Add-a-little-two-analog-axis-thumb-joystick-to-you/
Could you link any guide or manual to understand how to do this?
I only need the joystick, no need for the 25 buttons. Maybe 2 buttons but that is not essential.
Could anyone help?