For simplicity's sake, let's say I'm building a small square fence like the one below. It has four 2" pipes that are secured to the concrete. The wire rope will go through each tube, like in the picture. The wire has to be tight enough so that the wire is straight, but that's it.
What clips (if any) should I put in each hole to secure the wire? If clips are needed, would the holes need to be a certain size? These clips would also prevent water from going in. How are these clips called?
How do I tie the two loose ends of the wire rope to each other?