Simplify?
I use a small piece of bailing wire. (A small roll is always on the boat --- if I can't fix it with bailing wire or duct tape it can't be fixed!) I form a "staple" from a 3" long piece, push the "legs" through the ends of the joining lines, twist the ends of the wire together with the twisted end trailing away from the direction of pull. Simple, quick, and it's never failed me.