Epson Epson - Manual (Page 81)

4. Push the SIMM into the socket until it is seated firmly in the
slot. Then tilt it upright, as shown below, guiding the hole
at each end of the SIMM over the retaining post at each end
of the SIMM socket. If it does not go in smoothly, do not
force it; pull it all the way out and try again.
5. Replace any option cards you removed. (See “Installing an
Option Card” for instructions.)
6. Replace the computer’s cover as described under “Replacing
the Cover. “Then see “Post-installation Procedures” for
instructions on configuring your computer with your new
memory size.
4-18 Installing and Removing Options