Gamecube Adapter for Wii U and PC not detecting

[Smojo10]

Hi. https://wiki.dolphin-emu.org/index.php?title=How_to_use_the_Official_GameCube_Controller_Adapter_for_Wii_U_in_Dolphin tells me that on Linux, I need to put a udev rule in the file /etc/udev/rules.d/51-gcadapter.rules . I have tried searching it up but cannot find it. Where can I find this. I;m tired of trouble shooting a damn USB adapter and i just want to use a controller.