Best way to monitor audio on 6D

[paulleavitt]

Hey all! I'm trying to figure out the best way to monitor external audio on my 6D.

My current setup is to pipe my Rode Videomic audio into my H4N, and then using the Sescom cable, attenuate that signal down to mic level for my camera (to avoid syncing in post), and give me a headphone jack.

But here's the complication, I'm not actually monitoring what my camera is recording, which I don't like, and I just realized that the 6D has a built in attenuator, so I could use a normal cable from H4N to the camera, but then I can't monitor audio. But I found out that Sescom makes a mini usb to 3.5mm adapter, so perhaps I could monitor audio directly out of my camera!?!
But ML doesn't have an audio menu on the 6D. Will this work?
This video shoes it working on a T4i or something, but it has the audio menu. http://www.dslrfilmnoob.com/2012/03/24/sescom-usb-3-5mm-headphone-monitoring-cable-video-review/
Thanks!
Paul