Epson 188 - Manual (Page 9)

9 • Getting Started
4. Unpack the ribbon cartridge and install it on the printhead.
5. Press gently on the ribbon cartridge until you feel it click into
place.
Note
If the ribbon won’t load easily, turn the take- up knob
slightly until the x-shaped notch on the bottom of the
ribbon cartridge aligns with the x-shaped insert on
the ribbon plate.