Toshiba Portege M400 User Manual page 173

10. Fit the memory module's connectors into the socket at about a
45 degree angle and push the module down until latches on either side
snap into place.
Align the notch of the memory module with that of the memory slot and
gently insert the module into the slot.
Slot B
11. Screw in the two screws and replace the memory module cover.
12. Tuck the keyboard ribbon cable into the groove under the palm rest.
Keyboard
ribbon
cable
User's Manual
Installing the memory module
Seating the memory module cover
Tuck the keyboard ribbon cable
Optional Devices
Slot A
Screws
Memory module
cover
8-12