Ricoh Aficio SP 8100DN Hardware Manual page 29

Installing Options
G
Be sure to install the User Account Enhance Unit as shown.
2
H
Align the notch of User Account Enhance Unit, and then insert it into the
controller board, pressing it down until it clicks into place.
I
Make sure that User Account Enhance Unit is firmly connected to the con-
troller board.
18
AQU012S
AQU013S
AQU014S