Okay, I have searched high and low on the internet, and I still remain clueless on how to mount a SFF-8643 SAS backplane other than using twisty ties. Twist ties are not the greatest long term solution here. Please help if you can. Here's an example of what the part looks like, but it's not the same brand.
https://preview.redd.it/y1ux06y68n5f1.jpg?width=800&format=pjpg&auto=webp&s=a6e519dce3d7c68d474d25865db2b4daca603f89
SFF-8643 Backplane with bracket supplied
Backstory: I am building a server in a Fractal Ridge case (crazy, I know). I have removed the 140mm fans (and added 3x 80mm at the top), which reveals some places to potentially attach something. The backplane part comes with the bracket in the second photo, which has some places to attach it to a cylinder of some kind, it's not threaded for screws.
Fractal Ridge case inside - removed the blue colored fans, and not using a video card
I've looked on the internet for a solutions, but I can only find "see if you can find a bracket" -- which doesn't help much. Short of making a 3D model of a plane underneath, or somehow mounting it to a pci bracket - I am out of ideas. Help?