I am looking to buy this 2x6 box guy said its a 123 chicago built box but no name on it. So was wondering if anyone has a pic of inside of a 123 chicago built box it is 2 2290s driving 6 2879s. Did notice in the back corner of box was like a round thing with like a triangle wire around the top of it. Just caught my eye. Thought it might be something to determine the builder.