My meter boxes are 14″x 9″ and about 6 1/2″ deep for the single, the double meter door is around 11″. The plan is to mount an American hockey puck lock 2000 series which is about 2 3/4″ wide to the front of the door via steel bar. Not sure if I am going to mount one or two locks on each door. The last picture is my cheezy diagram of my plan.
I noticed when I was tring to measure the double meter boxes that someone tried to drill one and hit the other with a hammer or something.