I get insomnia sometimes... most people take Nyquil or a shot of whiskey or something. I tend to take things apart.
Here is a shot of the front housing. A top mounted mode selector with 5pin (CN701), loudspeaker wired to daughterboard with 4pin (CN703), mic gain potentiometer on 3pin (CN601), and what looks to be a ground reference using the H2n's front grill screen.