qmk_firmware/keyboards/ploopyco/trackball/rev1_005/info.json

{
    "processor": "atmega32u4",
    "bootloader": "atmel-dfu",
    "matrix_pins": {
        "direct": [
            ["D4", "D2", "E6", "B6", "D7"]
        ]
    },
    "ws2812": {
        "pin": "B5"
    }
}