Coupling end piece for a control cable from a gearbox to a ball joint

A connector end piece of a control cable from a vehicle transmission to a ball joint of a part of a gearshift or of a part of the vehicle transmission, where the connector end piece is intended to go over the control cable and includes a radial window able to receive, by engagement, a cover having an inner threaded portion and a bore, where the cover is movable in a radial direction from a disengaged position to an engaged position in which it the cover engages with a threaded end portion of the control cable and locks said control cable in position, wherein the connector end piece comprises an end annular portion, coaxial with the control cable, the end annular portion having a locked groove and an unlocked groove, the end annular portion receiving a security ring, said security ring having a body, a pin, and at least one elastic tab;

• the at least one elastic tab engageable, with axial sliding movement of the security ring, in at least one of the locked groove and the unlocked groove, the body having an axial end proximate the connector end piece, the pin extending axially towards the connector end piece from the axial end of the security ring, wherein the security ring is movable from an unlocked position to a locked position in which:
• when the cover is in the disengaged position, the pin of the security ring extends into the bore of the cover and holds the cover in the disengaged position and prevents the cover from moving into the engaged position;
• and
• when the cover is in the engaged position, the pin of the security ring extends over a portion of the cover and holds the cover in the engaged position and prevents the cover from moving into the disengaged position.