I have the US Spars Z300e furling main for the Beneteau OC281. The shackle for the main does not appear to be the original. It is an oval ring with a gap. The main hangs off this ring with very thin wires that run through eyes on the ends of the ring and bridge the gap to retain the sail. Is this the standard setup? Can anyone post a picture of the shackle that the main is hooked on to?