Thanks to retrobrite I was able to restore and update this 2001 sun ultra-10 workstation to atx.
The idea was to make an early 2000s rig.
Found the fan controller and usb plate on waybackmachine, then scooped them up on ebay.
Unfortunately I had to drill most of of the SUN proprietary bits out of the case, but I have all the working hardware stored away.
I drilled the floppy section out too, and installed a slide out drawer bay behind the dummy plate, saving the software stickers.