Xerox WorkCentre Pro 575 Advanced Features Manual page 274

4. Holding onto the Toner Cartridge's handle, lower it into the
machine. Make sure that the four pins (two on each side) fit into
the grooves inside the machine.
Color coordinated "2" labels have been affixed to the Toner
Cartridge and to the inside of the machine. Install the Toner
Cartridge by aligning these labels.
14
The cartridge will click into place when it is completely installed.
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C-10 WorkCentre Pro 555/575