Hi, I need a SA cable for a 1955 Schwinn lightweight with SA 3 speed set up. I have the shifter and hub and a cable in horrible condition. It measures 18" housing and 55 1/2" total length. The shifter has just a small hole for where the cable goes, not a key hole shaped slot so I am not sure what kind of ferrule should be at shifter end. Any info helps or the actual correct cable in good usable condition would be great, thanks, Eric.