how to connect bluetooth mic to head unit?

does anyone know which holes or pins does the bluetooth mic on the ford focus go on the radio block at the rear of ford sony the head unit?
someone took it out of my focus prior to me owning it.
Bluetooth box and loom etc is there .but mic wire is gone.
baught a new mic but cannot plug it in.so no voice control. a diagram would be marvelous.

thanks alot ...roaches5