NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual page 88

3-20 Option Installation
Diskette Drive Signal Cable
A three-connector diskette drive signal cable comes attached to the system board and to the
standard 1.44-MB diskette drive.
The installation of a second diskette drive in your system does not require the replacement
of the existing diskette drive signal cable. Connect an optional diskette drive to the middle
connector on the standard diskette drive signal cable.
The colored edge of the cable goes to pin 1 on the cable connector. Align the red edge of
the cable with pin 1 (the notched end) on the drive connector.
Figure Section 3-13 shows a three-connector diskette drive signal cable.
Figure Section 3-13 Optional Diskette Drive Signal Cable