NEC Versa 2400 Series User Manual page 91

Locate the notched corner on the DIMM.
7.
8. Hold the notched corner towards the front of the system
and insert the module as follows:
T
Hold the DIMM at a 60 degree angle and align the
DIMM connector with the socket in the system. Push
the connector into the socket.
T
Press down on the DIMM until the locking tabs on
the sides snap into place, securing the module.
To remove a DIMM, press the locking tabs away from
the sides of the module until the module pops up. Then,
remove the DIMM.
DIMM features
Inserting DIMMs
Using Your NEC Versa 4-27