Since I said the server is coming together nicely, I figure I probably should drop some receipts on the progress!
The SSD mount fits super snug!
The PSU in the #MicroServerGen8 has a single 4 pin Mini-Molex Berg connector (for floppy drives).
HPE uses a 4pin Berg-to-Slimline SATA adapter to power the laptop-style CD drive (more accurately known as a "6p + 7p 13 pin Slimline SATA" connector, aka "ODD SATA").
I used a Slimline SATA > Full SATA adapter for the SSD
https://www.thingiverse.com/thing:4858944