The top one I can slide all four fingers in up to my hand. The dolly will fit and if it had a handle I could work it. You could cut a hole behind the ID plate. Then weld it shut and cover it up with the plate when you are done.
http://rides.webshots.com/photo/2522822030103315458mGfWzL
http://rides.webshots.com/photo/2496255030103315458LSgYND