Turtle Beach X12 Left Ear Wiring

[ProjectKain]

So after about 2 years My x12s left Ear ( the Mic Ear) has Stopped Working. After opening the Ear i noticed 2 wires weren't connect to anything one of them is a greenish metallic wire and other other was a copper wire which im assuming is the Speaker wire. What i need to know is what the green wire needs to be soldered back to

 

[ProjectKain]

I've Tried to Find the internal Wiring guide but the only one im able to find it is for The volume Control and not the Earmuff