Fridge Defend ARP Device

WesternHorizon wrote:
Worked up this illustration of controller wiring:

I have a question regarding this connection:
The Red Wire connects to the supplying 12 volt wire that was originally connected to the connector labeled "12V" on the refrigerator control board.
The yellow wire connects to the refrigerator control board where the supplying 12 volt wire used to be.
The Green wire connects to the supplying ground wire that was connected to the refrigerator control board labled "Gnd".
Question: What happens to that open connector spot on the refrigerator control board where that ground wire used to be connected?? do you leave it empty or do you twist in another wire and connect it together with the green wire? :h