Forget about security with those small locks, no matter what the key number. Mine was broken into in storage. They used a screwdriver or something similar and simply pryed the doors. No damage to the doors. Only a very small black mark on the frame where they pried. The tabs on the locks were bent at about 45 degree angle. I pressed on the tab with my thumb and bent it back in shape with very little force.
Not likely anyone intent on theft is going to worry about carrying the right key.