Epson 2000 - Manual (Page 59)

4. Position one of the memory chips over the socket as shown
below, aligning the pins on the chip with the holes in the
socket. Make sure the small notch on the end of the chip
aligns with the corresponding notch in the socket.
notch
5. Gently press the chip halfway into the socket (to make sure
it is correctly aligned). If the chip does not go in smoothly,
remove it and try again.
6. When the chip is properly positioned, push down firmly on
both ends to make sure it is well-seated.
7. Repeat steps 4 through 6 for each of the remaining chips.
8. Replace any option cards you removed. See page 3-13 for
instructions.
3-18 Installing and Removing Options