Have you also bought an Arduino I2C breakout adapter for the Wii Nunchuck and you are wondering how you get a solid connection between your Nunchuck and the adapter? Get this thing printed and you are done! Simple design for easy and fast printing. No unnecessary design elements. Enjoy!You can try it with or without support. I tried it and both version work for me (only a matter of minor better quality). Insert the breakout adapter from above and then connect the Nunchuck plug.