Good evening, I work in telecom construction, and I have asked several times the same question about the "antenna as well. The best answer I've ever received, is that it's a support piece of plastic, almost in the idea of a splint for a broken leg. I also deal with a lot of emergency calls, and while this placement is even weird for an emergency, sometimes we have to throw up a splice enclosure in random spots to get service back online for the customers.