Every vehicle manufacturer offers options on every vehicle. Wire and connectors are really cheap, it's the finished wiring harness that is expensive, so to save money, they make just one wiring harness for every vehicle of a given model, instead of making 375,000 different ones for every possible combination of options. The savings are substantial, and it leads to nearly every unit that comes off the production line having wires that go nowhere, depending on what options are installed and not installed.
So, go look under the hood of any of them, you'll find cut off wires dangling here and there. Don't worry about it, it just means that there was an option for something you don't have.
