The part number 5303918301 is a heater kit with a thermostat. When the temperature in the garage goes below 50 degrees the heater warms the oil in the compressor so it doesn't get too thick.
I don't have any pictures or installation instructions. The kit should be installed by a technician as it requires some wiring modifications on the refrigerator. The heater will mount on the refrigerator compressor and will not take up any extra room.