NEC VERSA 4000 Manual page 30

Terminals
Notched End
Inserting the battery pack
5. Replace the battery bay cover as follows:
Align the tabs on the battery cover with the notches
in the system.
Lower the cover onto the system.
Slide the cover towards the middle of the unit. Tuck
the tabs on the back of the cover under the chassis.
Tabs (not shown)
Notch
Tab
Notch
Replacing the cover
Using the Hardware 2-7