Grey plastic case insert for the right hand ports (FW800, FW400, USB & security slot) of models of 15" Aluminium PowerBook G4. This is the frontmost of two such port trims on the right hand side. This item is stuck onto the inside of the bottom case and provides electrical insulation between inserted plugs/connectors and the PowerBook casing. It also incorporates the small metal plate behind the security slot. It can be stuck in place with contact adhesive or double sided tape.
This is a used, tested & working part from a recycled Powerbook.