Puzzled, electrical problem, melted wires

Was putting the center console back in after adding in car communications jacks. Had them running along the factory wiring. As I was putting the console back in I hear a pop and then smoke from under the console. I searched for 1-2 hours tracing wires and couldn’t see anything that was wrong. The wire that melted was a ground wire that’s pictured. This is an almost new machine with 100 miles but out of warrenty. 2014. Ideas?