I finished last time in a bit of a dilemma, how to but joint the wire rope guard rails. Following discussions at my railway club monthly meeting I tried to use what is commonly known as a Choc Box connector. This did the job but I was not really pleased with the look when fitted in place.
So after some considerable thought I came up with this. A 1" length of 2.5mm aluminium tubing filled with superglue was I my opinion the answer.