Well that was the mystery since it did not attach to any meter in the apartment building.

And it did not attach to the main transformer on the street.

NYC is pretty old not crazy old links Europe cities or some Chinese cities.

So it does have some hidden spots. We were a mile from a large con-Ed power plant maybe the wire tapped into an underground cable. I  will never know but I do wonder about it every once in a while since it was a pretty cool mystery and in my favor.😁