Ricoh Network Data Protection Unit Type C - Manual (Page 69)

Installing Options
69
F
Align the notch of the user account enhance unit, and then insert it into
the controller board, pressing it down until it clicks into place.
G
Make sure that the user account enhance unit is firmly connected to the
controller board.
H
Align the controller board with the top and bottom rails, and then push
it carefully in until it stops.