Entering Flashing Mode

Hold the golden button down while plugging the USB-C cable into the PCB.

Copying Firmware To PCB

A window will pop up containing "INDEX.HTM" and "INFO_UF2.TXT"

Copy the downloaded "PROGCC_RP2040.uf2" file into the folder. The controller will automatically reboot when the firmware is installed.

Enabling Pro Controller Wired Communications

Go to your settings on the Nintendo Switch

Then scroll down until you see "Controllers and Sensors"

Press A, then scroll down to Pro Controller Wired Communication

Press A, you will recieve a prompt about NFC functionality, press A once again.

You now have Pro Controller Wired Communications enabled.