Here is a shot of the deck I built for mine.
Both sections are identical "pie" shaped pieces and just sit on top of the beams. I never got around to attaching them. The posts(6) are centered on the imaginary "spokes of the wheel" with the beams bolted to them.
We won't get into the numerous code violations I have
Do you have any building plans and/or measurements? I would like to build something similar.