qmk_firmware/keyboards/ymdk/ymd75/rev3/info.json

{
    "usb": {
        "device_version": "3.0.0"
    },
    "backlight": {
        "pin": "B6",
        "levels": 12
    },
    "indicators": {
        "caps_lock": "C7"
    },
    "processor": "atmega32u4",
    "bootloader": "atmel-dfu"
}