Epson Endeavor - Manual (Page 57)

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. Repeat steps 3 and 4 for the second SIMM.
6. Replace any option cards you removed. See page 2-16 for
instructions.
7. The next time you turn on your computer, run the SETUP
program so your computer can update its configuration
information with the new memory. See Chapter 2 of the
Setup Guide for instructions.
2-14 Installing and Removing Options