/diy/ - Do It Yourself

Lads, help me out.
So I have this U-229 to kenwood connector (basically from radio to headset: microphone, speaker, push-to-talk). After I opened I noticed something weird. I have to this day connected all the pins to correct places with few resistors if needed but Ground and Microphone ends hand some weird things going on.
Might this be a amplifier circuit or some audio quality circuit or what is going on?
Can capacitor microphones even be amplified without external power? I imagine the sound quality would suffer.
I made a shitty picture of the circuit cause the whole thing was covered with hot snot. I'm 95% sure it was wired like this.

Added the npn symbol but might be wrong. I'm retarded with electronics.