Epson 3865X Plus - Manual (Page 227)

4. After you align the drive, insert one screw into the front
hole on each side of the drive bay and tighten them with a
screwdriver, as shown below. (Even though there are four
holes, you can secure the drive with just the two screws that
came with your drive.)
If you are installing a diskette drive, go to step 5.
If you are installing a hard disk drive, go to step 6.
5. If you are installing a diskette drive in the lower drive bay,
you may want to turn the subassembly upside down and
place it on your work surface. Then locate the diskette drive
ribbon cable; one end is connected to the top diskette drive
and the other end is free. You need to use the connector in
the middle of the cable to connect the second diskette drive
you are installing.
As shown in the next illustration, there is a large slot in this
connector and a small plastic divider near one end of the
slot.
B-36 Installing
and Removing Disk Drives