An electronic packaging assembly in which a box containing electronic components is slidably mounted on a support and carries at its rear an electrical connector assembly which engages with a mating connector member mounted at the rear of the support with zero insertion force. Means is provided for moving the contacts mounted in the connector assembly at the rear of the box to bring the respective contacts in the two connector halves into engagement. Such means includes a motion transmitting element which extends through the box and a pivoted handle at the front of the box which actuates the motion transmitting element. A hook is provided on the handle which latches the front of the box to the support simultaneously with the actuating of the movable contacts. The connector assembly is a modular assembly in which individual connector modules containing either movable or fixed contacts may be mounted in any arrangement in the shell of the assembly. The actuating mechanism shifts the movable contacts in those modules containing such contacts regardless of the position of the modules in the connector shell.