I remember when I worked as a dealer service tech, people would come in saying something is missing, or came unplugged and point to a loose connector. Even after explaining it was for something their particular car didn't have, I think a few didn't understand when you tell them for example, "that's for the cruise control servo and your car doesn't have cruise" or "that's the connector for the A/C clutch, that one's for the low pressure switch but your car doesn't have A/C". No cruise or A/C, shows you how long ago that was, lol.