I think the plastic drive disc is like a fuse. If the cable or angle drive won't turn the plastic disc will allow the drive cable (square cable) to twist inside the plastic disc. Bolting directly through it will defeat that intended purpose. Perhaps the easiest way to fix a bad square drive cable is to replace it with a piece of square stock. Now it won't matter which way the thing is wound. Another posability is to just braze the square drive cable to each end of a piece of round stock, the correct overall length of course. I would try to leave the plastic drive cap as it is though. David Teitelbaum vin 10757