The invention relates to a connector for motor vehicles. By means of the invention the device for assuring the position of the contacts is prevented from being accidentally displaced from its shipping position to its use position. To this end, the device for assuring the position of the contacts is locked in the shipping position against a stop. On insertion of one or more contacts into its respective cavity, a direct interaction between this contact or these contacts and the device for assuring the position of the contacts causes escape from the stop. The device for assuring the position of the contacts can then be displaced from its shipping position to its use position.