Attaching the Paper Guide Base
To install the paper guide base follow these steps:
1.Make sure the paper guide cover is open as shown below. Attach the paper guide base by sliding the slots on the bottom over the pegs located behind the paper tension unit, then tilt the guide back until it stops.
paper tension 
unit
paper guide cover
cCaution:
Make sure to slide the slots on the bottom of the paper guide over the pegs located behind the paper tension unit on each side of the printer.