Bought a new head unit, working on installing it today and I find this third plug on the harness plugged into the radio. Every adapter harness I've seen only has the two plugs mine has so what is this one for and what am I supposed to do with it? Only has 2 wires coming out- pink, and white/orange stripe. Car has Shaker 500.![20230205_135557.jpg 20230205_135557.jpg](https://www.s197forum.com/data/attachments/61/61879-5f6842841001a72e77fd422f2999f95d.jpg)
![20230205_135557.jpg 20230205_135557.jpg](https://www.s197forum.com/data/attachments/61/61879-5f6842841001a72e77fd422f2999f95d.jpg)