Epson Equity 286 PLUS - Manual (Page 159)

4.
5.
Use one of your hands to hold up the subassembly or have
someone do it for you. With your other hand, grasp the hard
disk drive ribbon cable that you tucked beneath the
subassembly. Pull the cable under the subassembly all the
way to its left side.
Carefully lower the front of the subassembly onto the
computer, as shown below.
small tabs
B-20 Installing and Removing Disk Drives