When I operated cranes, I would change the reeving of the cable sometimes daily. It was only 7 / 8, and if you let it get away and it slap you across the face or head you were probably going to the E.R. The ones I see here look like up to 3 inche diameters, tremendous energy stored when it is bent. Screw up with these large cables, and that end can come around and get you so fast, and so hard, you can't get out of the way fast enough. 100 percent concentration, knowledge, safety or you can be terrible hurt or worse. I learned how to splice ropes with the same methods in Boy Scouts back in the '60s. I always wrapped my splices and tried to stretch them afterward to tighten up the splice. I took the wrapping off afterward. Never had a failure. I've still got my Marlinspike knife.