Casio mt-40 / mt-41 - multiple audio outputs

Where on the MT 40 / MT-41 PCB can you tap the audio signal to get demuxed outputs for the bass, keys and drum (preferably kick, snare and hi-hat separate) sounds?

If someone has a schematic / service manual of the MT-40 / MT-41 to share here, then that would also be helpful in order to figure out the above.