3D Printed "Molded" Strain Relief

Just stumbled on this today while reading more about cable strain relief design.  This would be another possible way to do a 3D printed strain relief.  I know from other projects that ball and sockets work very well for 3D printing.  The trick would be getting the ball and sockets over the connectors of an existing cable.  I suspect these cables are manufactured by first putting the ball and sockets on the cable, then making the connectors.