NEC N8100-1417F User Manual page 319

9.
Route the 4-pin connector side of USB interface cable through the space between the fan
and the bottom face and around the internal USB floppy disk drive.
NOTE:
If any other USB device than the internal USB floppy disk
drive has been installed in the server, use the interface cable for internal
USB floppy disk drive stored in the chassis. Do not use an interface
cable that comes with the floppy disk drive.
10.
Connect the 4-pin connector of the USB interface cable to the internal USB floppy disk
drive.
NOTE:
Pay attention to orientation of the connector. The USB
connector cannot be inserted reversely.
Upgrading Your Server 9-61