Lexmark 302 - Manual (Page 170)

Installing the Ribbon Cartridge
To install a new ribbon cartridge, follow these steps:
1. Get a new ribbon cartridge and remove it from the package.
2. Remove the yellow clip from the ribbon.
3. Turn the blue ribbon advance knob clockwise to take up slack
in the ribbon. If the ribbon does not move, contact your place of
purchase and replace the ribbon cartridge.
Rem ove Yellow Clip
Blue Ribbon Advance Knob
3-4 User’s Guide Model 302