When I was young, I was very very stupid and ripped this panel off thinking there would be GameCube ports underneath (didn't know the second model removed all GC compatibility.) Where can
Nintendo Wii Console GAMECUBE COMPATIBLE Sensor Bar Cords RVL-001(USA) RED/BLACK | eBay
Is The Wii Backward Compatible? – Retro Game Buyer
Buy Old Skool GameCube / Wii Compatible Controller - Red/Blue Special Edition Online in Taiwan. B07HZ5PVT2
List of GameCube Controller-compatible Wii video games - Codex Gamicus - Humanity's collective gaming knowledge at your fingertips.