Thanks for bringing this up.
I don’t plan on adding a PCIe card unless i need to use an HBA. So the most strain on the board will be the CPU cooler and the MCIO cable. In addition i think i will use a plastic spacer to compensate flexing.
The missing online documentation is something that annoys me a lot. But welp, its not that uncommon in the server sector i assume. There are some zip files in stp format, but i don’t have a 3D CAD program.
About the connections and the hole L i found an image in this forum. From what i see, the cables should fit under the fan.