Jeep TJ third brake light/ high mount brake light missing contact repair

The TJ was missing the lower contact and the connector was in the body, all I saw was an open hole. Using a 3/16 carriage bolt and some spare grommets I was able to repair it in under 5 min.
The grommets specifically came from a Subaru head gasket kit, I’m sure you could use some electrical tape, or cut up some kind of insulating material to achieve similar results.