Lexmark C520 - Manual (Page 132)

Attaching cables
132
Installing and removing options
Attaching cables
Connect the printer to the computer using the appropriate cable for the configuration.
Connect the printer to the computer using a USB cable, an Ethernet cable, or a parallel cable.
A USB port requires a USB cable. Be sure to match the USB symbol on the cable to the USB symbol on the printer.
Match the appropriate Ethernet cable or parallel cable with the connector shown as follows:
Ethernet connector
USB connector
Parallel connector
USB
symbol