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

HP Proliant MicroServer Gen8 ODD to 2.5" SSD/HDD adapter remix by mindogas

Added screw holes to mount HDD or SSD firmly. [2021-05-17 EDIT] Added remix (AA8_ssd 95.stl) for 9.5mm HDD/SSD. Original file (AA8_ssd.stl) is for drives up to 7mm.