An electrically conductive part, intended to provide electrical impedance matching when connecting a connector with a cable, comprises at least one pair of twisted electrical wires, comprising a front portion, the shape of which has a continuous outer profile and which defines on the inside at least two housings, each of which is suitable for housing the unstripped portion of a cable wire; and a rear portion, extending from the front portion, the shape of which has a discontinuous outer profile defined by fins taking a shape that is complementary to that of the unstripped portion of the wire of a cable.