qmk-firmware/keyboards/recompile_keys/nomu30/rev2/info.json

{
    "matrix_pins": {
        "cols": ["C4", "C5", "C6", "C7", "B7", "B6", "B5", "B4", "B3", "D5", "D4", "D3"],
        "rows": ["B2", "B1", "B0"]
    },
    "diode_direction": "COL2ROW",
    "processor": "atmega32u2",
    "bootloader": "atmel-dfu"
}