[Milsurplus] PRC-132 Microphone Connections

[Richard]

Has anyone spooked out the microphone connections?  A friend wants to 
use a conventional Motorola dynamic microphone rather than the M80C/U 
microphone.  I figured that pins A & B are audio out, and pins A & E are 
hand key, but microphone has escaped me.  Looking at the M80C/U I am 
confused, and it probably isn't working correctly anyway.

Richard, AA1P