An actuator (1) for a vehicle includes a base (4), a covering element (5), a handle piece (6) arranged rotatably in the covering element (5), and a cable (25) with a terminal fitting (26). The actuator (1) is insertable into a metal structure of a vehicle seat backrest. The base (4) has a guiding element (32) that moves the terminal fitting (26) into an initial position for assembling the handling piece (6) to the terminal fitting (26). The guiding element (32) is between a core (24) of the cable (25) and prevents the terminal fitting (26) from rotating.