Movable and adjustable fixing systeme and electrification of a vehicle seat

The system has a slide (2) fixed to a structure of a vehicle, and an anchoring mechanism provided with a mobile lock (16). A conductive finger (23) is embedded on a mobile support. The mobile support is controlled by the lock such that the engagement of the lock in the slide drives extraction of the finger for permitting an electric contact between the finger and a conductive track (14) and the retraction of the lock drives retraction of the finger for breaking the electric contact between the finger and the track.