NEC DIRECTION L Manual page 76

Insert the DIMM into the socket. Close the plastic clips
5.
at both ends of the socket.
Replace any cables or boards that may have been
6.
removed.
Replace the access cover (see "Replacing the Access
7.
Cover).
Your system automatically detects the memory at bootup.
VIDEO UPGRADE
Your computer comes with an AGP video board.
See your video board's documentation for information on
upgrade capabilities.
Installing a DIMM
Installing Options 5-17