Dell Latitude 3380 Owner's Manual page 12

4 Hold the sides of the palm rest securely while pushing into the two release holes using a plastic scribe.
NOTE: It takes some force to push out the keyboard through the two release holes. Please exercise due caution.
NOTE: Picture for representational purpose to show exact location of keyboard latches. It is not necessary to remove
the heat sink, hard drive, or system board in order to access the keyboard release holes.
12 Removing and installing components