Had same problem , involved lot of bus journeys till right one was supplied. Originally Ricambio of Wallington Surrey supplied me incorrectly a Sporting cable when my Sei was an S model.. on their web site they say their "ring" end is a lot stronger than the original 90 degree bend.. I believed it , went up to South London, purchased, 2 hours plus bus journey down to Sussex where it had expired to find out the "S" was a shorter cable ( thanks to Thames Fiat of Slough on the phone ) . Ricambio sent me by courier and more expensive as it wasnt their stock item the correct cable for my 02 "S".. fitted it, new split pin cos maybe that was the cause of the original pulling out of the fitting.. used white grease ( aerosol) to lube it. Job done ( plus 20 or so miles to return the incorrect cable to Ricambio ).. end result " one Happy Seicento owner ! "