How to setup stereo aux mix for in ears on a RML32ai

Hi guys, I have a brand new RML32ai and the online documentation does not show the UC software correctly as to how to tu Aux out into stereo for in ear monitoring. It shows the the Aux as Mix1, mix 2 etc, but the ability to select stereo and combine Aux 1 and Aux 2 does not seem to be present in the current software. If somebody can clearly explain how to do that now I would appreciate the help.

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