Lexmark Optra S1625 User Manual page 300

Installing Options
Mounting Slot
284
Output Expanders
3
Insert the mounting brackets located on each side of
the output expander into the mounting slots located
on each side of the exposed area in the top portion of
the printer.
To help maintain alignment of the brackets to
the slots, align the right and back edges of the output
expander with the corresponding edges of the top portion
of the printer.
Note: Make sure the output expander is connected
securely.
Mounting Bracket