I have a Sony HXR-MC50, two Sony wireless UWPs,a Beachtek and a Fig Rig.
What's the best setup:
-Mounting the receivers to the horizontal Fig Rig bar on either side on the camera?
-Mounting the receivers to the camera (which is small and I have no idea how to do)
-Something else entirely?
adding weight to a stabilization apparatus may destabilize your perfectly balanced setup. Also the Fig Rig will get heavier the more stuff you add. If you are trying to operate the audio levels and shoot and hold this two handed rig, you might want to get a helper.
Otherwise clip the receivers to your belt and run a coiled XLR cable to the Beachtek which I assume is mounted under the camera.
When you hire an audio person, they provide you with an XLR cable and headphone cable to plug into the camera, or a wireless receiver depending upon how far from the audio person you are going to be.