Lexmark Optra S1625 User Manual page 304

Installing Options
288
Output Expanders
7
Align the tabs on the left side of the top cover with the
left side of the opening at the top of the output expander.
The tabs must go underneath the left side cover of the
output expander.
8
Push the right side of the top cover down until it
snaps into place on the output expander.
Note: Verify that the output expander is installed
properly. See "Verifying the Installation of Options"
on page 325.
9
Turn the printer power On (|).
Tabs
Top Cover