Konica Minolta Magicolor 2450 - Manual (Page 155)

Duplex Option 141
Duplex Option
Duplex (2-sided) printing can be performed automatically with the duplex
option and enough memory installed. See “Duplexing” on page 73.
Installing the Duplex Option
1
Turn off the printer.
2
Remove the two knockout plates
and the tape.