To remove the base cover, remove all the screws from under keyboard using a J1 Phillips head screwdriver. There are 13 screws.

Note, ten of the screws are size M2x8 and three are size M2x4, remember where they go.

Flip the system over.

Press down on the tab labeled door release until it releases. The tab is located on the lower right side of the system.

Remove the base cover by removing the three screw opposite of the battery side.