RV14 with GTN750 and Real Sim Gear 650 sync

[massild]

I have the RV14 with the TDS750 integrated into the virtual cockpit and I also have the TDS GTNxi add on product that I use with Real Sim Gear GTN650.  The problem I am having it that the integrated GTN750 is the primary GPS source no matter what I do.  So the G3X only uses it as a NAV source.  Can this be changed?

Thank you