Step 1: Obtain Warded lock(s)
Depending on the size of lock you want to make, you may want to pick up a couple of locks. I got a package of 3 at a local hardware store for 5 bucks. To make this easier get WARDED LOCKS. They are simple and cheap. They are one of the most insecure type locks so this makes them cheap. It will also make it easier to tear apart and reassemble and the hasp might even still "lock" and work as mine ended up doing. Also be sure to get the type of padlock that is put together in layers and not solid.