In reply to jacobjlloyd:
Forgot to reply to this.
Last Friday I went into the gorge and replaced the entire cable run that had the damaged bit in it. The cable I used was 1mm thicker than the previous one, each end has three wire rope grips on it, and those in between have two, I replaced some of the thimbles as well; I reused a few as they were okay. I checked all of the bolts at the same time. One nut was loose, that is now sorted.
I have pics if anyone wants them.
Disclaimer - I accept no responsibility for the work that I did. I will not be held liable for any problems, loss, injury or death incurred by anyone undertaking a walk along the Camino Del Rey, and in particular with regard to the wire that I replaced.