qmk_firmware/keyboards/25keys/zinc/rev1/info.json

{
  "keyboard_name": "Zinc rev.1",
  "matrix_pins": {
    "cols": ["F4", "D4", "C6", "D7", "E6", "B4"],
    "rows": ["F6", "F7", "B1", "B3"]
  },
  "diode_direction": "COL2ROW",
  "split": {
    "soft_serial_pin": "D2"
  }
}