Epson EL 3S/33 - Manual (Page 50)

3. Position the first SIMM at an angle over the first empty socket
in the bank you are filling, as shown below. The components
on the SIMM should face the inside of the computer.
4. Push the SIMM into the socket until it is seated firmly in the
slot. Then tilt it upright, as shown above, 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. Repeat steps 3 and 4 for each additional SIMM.
6. Replace any option cards you removed. (See page 3-13 for
instructions.)
Installing and
Removing
Options 3-11