Audiofuse 16rig: Routing Audio to Zoom? (Mac O.S.)

I can select the 16rig as my audio device for audio in/out, but it seems I can only get audio inputs 1/2 to work for getting audio from my physical microphone into zoom… What I was/am attempting to do is route my master bus in Logic Pro to a set of stereo USB channels, then out to zoom for remote collaboration on sessions… anyone have insight on this?