According to the invention, the electronic box comprising a main connection zone defined on one of its walls and in which is arranged at least one main connector designed to receive an external connection cable, is wherein it comprises: an attachment zone separate from the main connection zone and defined on another wall of said box, in which means for attaching a box to an external support are able to be arranged, and a moving part configured to occupy at least: a closed position in which the main connection zone and the attachment zone are simultaneously covered to prevent access to said attachment means and to said external connection cable, once the latter respectively are fitted and connected, an open position in which the main connection zone and the attachment zone are accessible.