Hi Todd,
the Brennan website has lots of info on this
Its all most easily done using the Web UI and in the case of Optical out just plug the cable in to the B2.
Even when there are no wired speakers directly connected the B2 display will still show "wired speakers".
In my case I only have Optical out and my display still shows wired speakers
If you are still stuck after reading the Brennan website please re-post
John