Audio to URSA BC G2 from ATEM

I have a ATM constellation 4K 2ME and both fiber converters for the broadcast G2. I am trying to get audio to the camera for iso recording through the fiber cable, is there any way to do this? Or do I have to run an XLR to the camera?

Unfortunately you will have to run an xlr. I used to iso record on camera using the camera mic for 3 cameras and an xlr run to another as back up to the constellation audio in. I've since built a fibre rack which has hyperdecks and audio-sdi boxes to iso record with proper audio from each camera

Well, you could use the ENG-Channel an build an 5pin to 3pin XLR adapter.