Apple PowerBook (Memory (RAM) Replacement) - Manual (Page 12)

PowerBook (FireWire) Memory (RAM) - 12
Closing the Computer
1 After replacing RAM in the upper or lower RAM slot, insert the internal
heat shield.
Important: When replacing the internal heat shield, make sure it does
not cover the plastic tabs for the hard disk and optional AirPort Card.
The plastic tab for the processor module should be placed under the
heat shield.
2 Press down on the bottom portion of the heat shield to secure it and
then replace the screws.
3 Flip the keyboard over and insert the small tabs at the bottom of the
keyboard into the openings in the PowerBook case.
Screws
Hard Disk Tab
AirPort CardTab
Heat Shield
Processor
Module Tab