Epson Progression U12 - Manual (Page 84)

3. Gently push the SIMM into the socket and then tilt it left
until it is vertical, guiding the holes at each end of the
SIMM over the retaining posts at each end of the SIMM
socket.
retaining post hole
The SIMM should snap into place over the retaining posts.
If it does not go in smoothly, do not force it; pull it all the
way out and try again.
Make sure the SIMM is fully inserted into the socket and
that the pins on the retaining posts extend through the
holes in both ends.
4. If you are installing a second SIMM, repeat steps 2 and 3 to
install it in the other socket.
5. After you replace the computer’s cover, be sure to run the
SETUP program so your system can update its
configuration. See Chapter 2 of the Setup Guide for
instructions.
Installing and Removing Options 3-15