Epson ACULASER M8000 series - Manual (Page 24)

Rear view
a. cover B lever
b. cover B
c. upper option cover
d. AC inlet
e. circuit breaker switch
f. lower option cover
g. parallel interface connector
h. USB interface connector
i. Type-B interface card slot cover
j. Ethernet interface connector
EPSON AcuLaser M8000 Series User's Guide
Getting to Know Your Printer 24