Mitsubishi Electric LS Pro Hardware Technical Reference page 31

The SIMM connectors are located on the right side of the system board just behind the
floppy drive bezel as shown in the following illustration.
Note
When removing and installing SIMMs it is easiest to work with the rear of the system unit
towards you. As a result the following instructions assume that you are viewing the system unit
from the rear.
Removing SIMMs
If you wish to install an upgrade in a pair of SIMM sockets which are already occupied
you must first remove the existing SIMMs. Starting with the SIMM nearest the rear of
the system unit and working towards the front:
1. Lever the metal clips on each side of the socket gently away from the SIMM using
your thumbnails. When the clips are far enough apart the top edge of the SIMM
will move backwards until the SIMM is at an angle of about 15°.
2. Taking care to avoid touching any of the components on the SIMM grip the top
corners of the SIMM between thumb and first finger and carefully pull the SIMM
out of the socket.
3. Repeat steps 1 and 2 for the other SIMM(s) affected.
SIMM SOCKETS
LS PRO HARDWARE TECHNICAL REFERENCE 2/17
System unit