Apple Mac 8600 - Manual (Page 232)

Upgrades Bottom Drives - 9
If you are installing a 50-pin drive:
s
Warning:
Before completing this procedure, you must
terminate the 50-pin drive you are installing. Failure to do
so can severely damage the computer’s logic board.
6 Remove the terminator from the 50-pin SCSI cable.
7 Feed the cable down through the hole in the upper drive
chassis, similar to the routing of the Ultra Wide SCSI
cable shown in the previous graphic.
8 Connect the end of the 50-pin SCSI cable to the
terminated
lower hard drive.
Note:
If you attach more than one terminator to the
internal SCSI interface, the computer’s logic board may
be severely damaged.