It has a plastic enclosure, and the Bezel is hiding two cut-outs what seems to be 5.25" drive bays.
AFAIK, Commodore never used these bays to install drives there.
I thought about doing so, but this would need a fitting bezel.
PET-2 is bundled with a rather interesting item, a Computhink 800k dual drive with controller card
Mine uses only 40 track single side, with 200k per disk.
Are these 80 track double side drives?
I would be interested in details.