Motorola 53863 Two-Way Radio Earpiece w/ Mic

[Ol' Kev]

Has anybody ever tried or have an idea how one might wire the connections to use a Motorola 53863 (HMN9039)Two-Way Radio Earpiece w/ Mic on a K2?

I read that this boasts a very sensitive microphone and that this headset uses an electret condenser microphone.  

THANKS IN ADVANCE