Epson 486SX - Manual (Page 98)

Replacing the Subassembly
Follow these steps to replace the subassembly:
1. Turn the computer so you are facing the front panel.
2. Hold the subassembly at a slight angle and guide the front of
it down through the opening in the front of the computer,
as shown below.
3. Fit the two holes in the lower front of the subassembly over
the two posts on the front of the computer case, as shown
above.
5-8 Accessing Internal Components