looking for help finding / figuring out how to wire in daytime running lights on a 2006 Mack MR. We have purchased the DRL module and found its location that part was easy. Now I have to figure out where to put the low pressure switch that turns on the lights when the brakes are released. Mack dealer told me that their should be a wire labeled  inside the dog house to hook up but I can't seem to track it down as well as I'm not sure where the switch should be plumbed into. Any help or pictures would be greatly appreciated thanks guys and gals.