Epson Equity 320SX PLUS - Manual (Page 89)

Removing the Subassembly
You need to remove the subassembly to install or remove
disk drives, or to access the SIMM or math coprocessor
sockets on your computer’s main system board. The
subassembly is the large metal casing that holds the
horizontal drive bays and the power supply, as shown below.
subassembly
Accessing Internal Components 5-5