Lexmark Optra 1200 Setup Manual page 42

Attaching the
rear output bin
Posts
36
Load paper
If you plan to load transparencies, envelopes, labels, or
card stock in the multipurpose feeder, you may want to
attach the rear output bin to the back of the printer. This
creates a straight paper path for the media and prevents
curling.
If you attach the rear output bin, you must remove it to
access the printer system board or connect cables to the
back of the printer.
To install the rear output bin:
1
Remove the bin from the packing materials.
2
Locate the two posts at the back of the printer.
3
Align the arrow on the bin with the arrow above
the right post.