Fujitsu DL7600Pro User Manual page 40

SETTING UP
2-10
6. Put the green ribbon guide into the space in front of print head. And
then place the mounting pins (both side of ribbon cassette) on the
slot of the printer cover. And then push the ribbon cassette so that
the ribbon cassette is installed vertically.
Mounting pin
Slot
Print head
Installing the ribbon cassette
Space
Ribbon guide
Push the ribbon cassette until it
clicks.
Mounting pin
Slot
User's Manual