Toshiba U400 User Manual page 124

6. Lift one side of the insulator sheet and fit the module's connectors into
the computer's connectors at about a 45 degree angle. Press the
module carefully to ensure a firm connection.
Do not touch the connectors on the memory module or on the computer.
Debris on the connectors may cause memory access problems.
Slot A is reserved for main memory. Use slot B for expanded memory. If
only one card is installed use slot A.
7. Push the module down so it lies flat. Latches on either side will click into
place to secure the module.
User's Manual
Removing the memory module cover
Installing the memory module
Optional Devices
Memory
Module Cover
Slot B
Slot A
8-7