Also take note in the same picture I cut about a inch or so into the duct so I could slide my cord into the duct, so when I hook the airbooster up to the end of it won't interfere with the cord,also take note,I wrapped up the cord where it begins to enter into the duct on both sides kinda built up tape on both sides of the cord so the cord can't move back and forth ,as well prevents you from pulling the cord out of the duct in case you dropped it or something,you don't want that cord moving around inside the duct while your adjusting your lights might cause something to wiggle loose so make sure you tape both ends of the cord up until you have a spacer made between the duct and the cord.................................