Pin Configuration for Breadboard 3.5mm Stereo Audio Jack
If you take a look at the datasheet, you will see a wiring diagram.  This wiring diagram uses audio jack notation (tip,ring,sleeve) so what you want to do is connect pin 1 from your audio jack to ground and pin 2 or 5 as input to the CM8770. One for left and right channels. Pin 2 and 4 on the audio jack is the audio signal you're feeding to the jack via an aux cable, so they don't really matter in this case.