I have 2 ADC 520IR camera’s that I am setting up. I was wondering what would be the best placement for them? I am attaching a drawing with my first floor setup. I currently have a ts1 by the main entry and keypads by the rear and garage door. I also have motion detectors as noted on the drawing. I currently have one of the cameras sitting on a piece of furniture, but want to have them mounted on the ceiling or wall. What would be the best placement for the 2 cameras?