I got AD-FMCOMMS3-EBZ in my hands. I also own Enclustra Mercury ST1/XU8.
There are 7 missing connections between ST1/XU8 and FMCOMMS3 HPC FMC connector.
With relatively simple patch I managed to make it works.
I would like to share what I did, so here is link to open source git hub xu8_fmcomms3 and image