For those of us with U-locks, how do you mount yours to your bike? I have two U-locks, one for just my bike and a longer one for me and hubby's bike when we're out together. I had been attaching the shorter one onto my rear rack with one of those reflective velcro things which seems to work well but it makes such a racket when I hit bumps. The longer one came with a bracket but I don't see where on my bike I could put it. If anyone has pictures of their U-lock get-up I'd really appreciate it. Thanks!