Both the diskette drive and hard disk drive sockets are located on the main system board on the left side of the subassembly, as shown below.
diskette drive socket
hard disk drive socket
subassembly - - E l -
Both sockets have a notch on one side. Connect the diskette drive cable first. As shown below, there is a tab on one side of the connector.
diskette drive connector
diskette drive socket
pyymqq
notch