Does anyone know what this box on the outside of my house might be for? It has four pipes going into the ground. The four pipes coming in all have a single blue, white, and green 12-gauge wire. All similar-colored wires are simply connected inside the box. I was hoping to run a new wire out of this to create an outlet for some string lights, but I'm not totally sure what this box might be for. Any help is appreciated. Thanks!