CC-Tweaked/projects/common/src/generated/resources/assets/computercraft/models/block/wired_modem_on_peripheral.json

{
  "parent": "computercraft:block/modem",
  "textures": {
    "back": "computercraft:block/modem_back",
    "front": "computercraft:block/wired_modem_face_peripheral_on"
  }
}