Bought some LED's (low beam)for my son's 13 NAV. These lights have fans and an external driver. I have them installed with the factory harness outside of the headlamp housing with no dust cap installed right now. I did a search in this section but can't seem to find anyone saying what they did about the dust cap. I can cut a groove in the cap for the wires to pass through and install the cap but I'm not sure about possible moisture issues. If this has been covered please don't flame me! I really did look first. Also please post the thread if you know where it is.