Okay. It's the larger serial port that it's going to. The one with the SCSI icon above/below it (I forget which).

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DO NOT PLUG IN NON-SCSI DEVICES INTO YOUR SCSI PORT.

Doing so can be FATAL to your macintosh. It is not a serial or parallel port, although they share the same connection. It could ruin the SCSI controller, which means no more hard disk bus. :O

(I was just a but worried, people understated what can happen.)