Quest MRC setup

Working on getting one of my apps to work with MRC on quest - aside from camera calibration and enabling it on the OVRManager is there anything else I am missing? When I open my app and connect to the quest in OSB the background camera is very high and doesn't see my controllers (Almost as though they're stuck in the ground). If I run the app in the editor I can see it generates 2 cameras at about 2 meters high. 

I think what I'm asking is how to I get the OVR manager to pick up my mrc.xml file when i launch the app on my quest?