keychron_qmk_firmware/keyboards/kprepublic/cstc40/single_pcb/keyboard.json

{
    "matrix_pins": {
        "cols": ["C7", "C8", "C9", "A8", "A10", "B10", "A15", "C13", "B6", "B5", "B4", "B3"],
        "rows": ["C12", "C10", "C11", "B0"]
    }
}