Star LC-8521 User Manual page 25

Important!
Make sure that the printer is unplugged from the AC outlet and that the
computer is turned off before connecting them.
Plug one end of the parallel cable into the parallel port of your computer.
The parallel port should be labeled "Printer," "Parallel," "PRN," "LPT1,"
or something similar.
Lift up the back of the printer and insert two books or other similar objects
underneath it to keep the printer raised
Plug the other end of the parallel cable into the socket on the back of the
printer and secure it in place with the clips.
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