A connector comprising a first module (1) on which a lever (6) is mounted so as to be able to rotate, and a second module (2), the first and second modules having complementary engagement profiles and receiving complementary contact elements, the lever (6) and the second module (2) comprising complementary means (8, 9) for driving the second module (2) in translation in a coupling direction of the first and second modules (1, 2), under the action of the rotation of the lever (6), the driving means (8, 9) being suitable for abutting to block the coupling before the contact between the complementary contact elements is established upon the introduction of the second module (2) into the first module (1) as long as the lever (6) does not occupy a rotation- stroke starting position for the purpose of the driving in translation.