Dell Vostro 2521 (Early 2013) - Manual (Page 15)

5. Disconnect the keyboard cable from the connector on the system board and lift the keyboard off the palmrest
assembly.
Installing the Keyboard
1. Connect the keyboard cable to the connector on the system board.
2. Slide the keyboard in its place on the computer and snap it into place.
3. Install the battery.
4. Follow the procedures in After Working Inside Your Computer .
15