if you can, I would keep the audio separate from the video and sync the two later. this is good for redundancy so if the audio on m10 fails, its still on the video.
but as freelunch suggests, you can patch audio out of camcorder into m10. I would keep it in manual mode and adjust gain.
I screwed that up!
headphone/line-out on m10 into mic-in on the camcorder.