QMS Magicolor WX User Manual page 166

23 Slide the cartridge into the printer until it snaps into place.
It's in place when you can see the green arrows inside the metal
frame of the printer.
24 Turn the green end-handle on the cartridge down to close it
and lock the cartridge in place.
25 Close the manual feed tray.
26 Plug in the power cord and turn on the printer.