Shore power cord stuck in the compartment.

Last year camping there was a rash of stolen electric cords. The ones that have the threaded ends and plug into the electric box. Real easy way of selling the copper for money I was going to make the change until I heard that. Also what I do is pull the cable out all the way and don't overlap it, and when that is done I take a piece of steel wool and put it into the electric hole then close the door and there is no way any mice are going to get in.