Ed:
The box had one large open KO in the side (probably 1 1/4"). At the time of this incident, there was also some debris up against the building - various old pieces of lumber, a couple of tires, old vines attached to the side of the barn, etc.
There were also two large KO's open in the back of the box - one contained wiring (obviously to a panel somewhere inside the barn), and the other opened to an unused hole in the wall behind the box. That old barn was probably a breeding ground for those darn poison ropes. Luckily we did not have any injuries/bites.

Mike (mamills)