I need to upgrade my locking system, but at the moment here it is:
I'm not sure if it could get more basic. The benefit of the long narrow cable is that it, being about 7 feet long, feeds through both of my pannier bag handles AND my front and rear wheels AND whatever post or pipe I'm locking to. The cost? The cable ties need only a pliers to loosen up. Somehow I've gotten away with this easy to hack assemblage..