Can anyone who has them please tell me if the housing is a simple clip-in type fitting. Reason I ask is cause I've ordered an A3 but was too late to add the fog lamps option. It's purely cosmetic and I know they won't actually work but prefer the look with lamps to the vents only set up. Thinking I could just get the part and swap out the vent for the fog-lamp version, providing the housing/fitment is the same. Thanks.