Apple LaserWriter 12/640 PS - Manual (Page 23)

2 Use the parallel cable to connect the computer to the printer:
What to do after connecting directly to a Windows or DOS computer
m Read the rest of this chapter.
See Chapter 3 for more information about setting up the printer.
Attach the cable’s smaller connector
to the parallel port on the printer.
Attach the cable to the parallel port on
your computer. (Your computer’s parallel
port may be in a different location.)
Secure the clips.
Parallel interface cable
23 Setting Up the LaserWriter 12/640 PS