That gets a basic mix into the HA4700 that you can tweak by adjusting the send levels, etc. I set that bus to output to MOTU outputs 1-2. So basically, in Sonar, I set up sends from the desired tracks to a headphone bus I created.
The backside of the bottom jacks I have connected: 9,10 - HA4700 L and R 11-14 - HA4700 Aux in 1-4. All of my MOTU outputs are connected to the back of a row of jacks on the top (9-16).