Plug intended to be mounted on at least one cable whose one end supports one or more contacts (21, 22), comprising: - a body, comprising: • a front portion made of electrically conductive material and extending along a longitudinal axis, the front portion being designed to be lodged in a socket, the front portion being adapted to lodge and hold the contact or contacts of the cable or at least an optoelectronic converter connected to the contact(s) of the cable; • a rear portion forming a sheath, designed to lodge the end of the cable, itself supporting the contact(s); the rear portion being mounted floating about the front portion; the plug being characterized in that it comprises further: - a plurality of flexible tabs made of electrically conductive material, distributed on the outer periphery of the front portion, the flexible tabs being adapted to remain in mechanical contact with the interior of the socket when the front portion of the body is lodged in the latter; - a lever for locking to a socket, the locking lever being mounted pivoting on the rear portion of the plug body, the lever comprising two locking hooks (53, 54) distributed on either side of the rear portion and designed to cooperate with two locking lugs distributed on either side of the socket. and in that the floating mount of the rear portion on the front portion of the plug body allows this front portion to remain off axis in the socket cavity, even if the rear portion of the body for its part tends to realign itself with said cavity, in particular during the locking of the plug to the socket with the means of the locking lever. - a body, comprising: • a front portion made of electrically conductive material and extending along a longitudinal axis, the front portion being designed to be lodged in a socket, the front portion being adapted to lodge and hold the contact or contacts of the cable or at least an optoelectronic converter connected to the contact(s) of the cable; • a rear portion forming a sheath, designed to lodge the end of the cable, itself supporting the contact(s); the rear portion being mounted floating about the front portion; • a front portion made of electrically conductive material and extending along a longitudinal axis, the front portion being designed to be lodged in a socket, the front portion being adapted to lodge and hold the contact or contacts of the cable or at least an optoelectronic converter connected to the contact(s) of the cable; • a rear portion forming a sheath, designed to lodge the end of the cable, itself supporting the contact(s); the rear portion being mounted floating about the front portion; - a plurality of flexible tabs made of electrically conductive material, distributed on the outer periphery of the front portion, the flexible tabs being adapted to remain in mechanical contact with the interior of the socket when the front portion of the body is lodged in the latter; - a lever for locking to a socket, the locking lever being mounted pivoting on the rear portion of the plug body, the lever comprising two locking hooks (53, 54) distributed on either side of the rear portion and designed to cooperate with two locking lugs distributed on either side of the socket.