Hello, I've lived in a rental house for about a year now and I have this two Xfinity cameras in the front of my house and there from the previous owner. I knew they work because the red senor light turns on when you walk in front of it and the green lights always on. Now I want to know if I can use hook those cameras up to a screen somehow. Theres a wall outlet in the master bedroom that I think the cameras screen hooked up too. I want to use them as my own and I dont know how.