HP C4381-90100 - Manual (Page 17)

1-6 Connecting CD-Writer
6. Attach the CD-Writer Plus drive’s data cable to your computer’s 25-pin
parallel port connector and hand tighten the retaining screws.
Attach the data cable’s remaining connector to the rewritable drive and
secure it by tightening the retaining screws.
CD-Writer Plus drive’s data cable
Attach this end to the CD-
Writer Plus drive.
Attach this end to the
computer’s parallel port.