Is your cable 1/8" now? I assume the original was thicker. 1/8" may have the working load strength, but think about what would happen if it ever did break, a real nightmare. In case some strands would break I would stay with the 1/4" or whatever you have now. I still need to measure mine.
AND don't use 1 x 19 wire
. I'm not an expert, but I think 1x19 wire is for standing rigging and not flexible enough for winch work. I think you need 7x19 flexible wire.
Here is a place for the swageless fitting. Quick Attach stainless steel rigging swageless mechanical fittings out preforms Sta Loc Stay Lock Norseman