Epson 24-Pin User Manual page 34

11. To replace the paper tension unit, lower it onto the printer's
mounting pegs. Then press down both ends of the unit until
it clicks into place.
12. Replace the printer cover by first inserting the front tabs into
the slots on the printer and then lowering the cover into place.
Push it down until it clicks.
Note:
You install the optional #7768 film ribbon cartridge the same way
you install the ribbon cartridge. However, you should follow the
guidelines below when using a film ribbon:
1-10
Setting Up the Printer