This is a little off topic, but never, ever, ever, never, ever, run the breakaway cable through the safety chains. It renders the breakaway switch useless. This is one of my really big pet peeves, and every trailer that comes through our shop with this done gets a polite tongue-lashing from me. A good friend did this, the trailer jumped off the ball, the chains fell off, and the trailer rolled across the interstate, hit another car, and killed a small child.
So, when you see me get bent out of shape about this practice, there is a very good reason for it.