Kyocera FS FS-1920 Operation Manual page 193

12
If the duplexer is installed, secure the power cord to the duplexer.
Take care not to loosen the power cord.
13
If the duplexer is installed, remove the two cut-out portions from the
upper part of the duplexer rear cover removed in step 5.
14
Reinstall the duplexer rear cover.
A-19
Installing Option Units
NO
Duplexer
Rear Cover