qmk_firmware/keyboards/mechlovin/delphine/mono_led/info.json

{
    "usb": {
        "pid": "0xDEF1",
        "device_version": "0.0.1"
    },
    "rgblight": {
        "sleep": true
    },
    "ws2812": {
        "pin": "E2"
    },
    "backlight": {
        "pin": "B6"
    }
}