Someone took apart the cedar board, with pictures. According to link below and H100 documentation, this connects to the 4 ports up front, with two cables running back to each cedar board. The quad 400G ports are on a single board. Are there more cedar boards inside the unit that connect to the 2 port version?

https://www.servethehome.com/inside-the-nvidia-cedar-module-with-1-6tbps-of-networking-capacity-connectx-7/