Dell Vostro 14 3435 Owner's Manual page 44

Steps
1. Connect the battery cable to the connector on the system board.
2. Place and snap the base cover into place on the palm-rest and keyboard assembly.
3. Tighten the four captive screws that secure the base cover to the palm-rest and keyboard assembly.
4. Replace the four screws (M2x5) that secure the base cover to the palm-rest and keyboard assembly.
Next steps
1. Install the SD card.
2. Follow the procedure in After working inside your computer.
44 Removing and installing Customer Replaceable Units (CRUs)