Dell Inspiron 15 3535 Owner's Manual page 55

Steps
1. Disconnect the speaker cable from the system board.
2. Unroute the speaker cable from the routing guides on the palm-rest and keyboard assembly.
NOTE: For models shipped with a speaker cable featuring an eight-pin connector, to disconnect the speaker cable from
the system board, pry up the bottom side of the cable connector's head first and then pull it away from the connector.
3. Lift the speakers along with its cable from the palm-rest and keyboard assembly.
Removing and installing Customer Replaceable Units (CRUs) 55