Hey all. I have a July/Aug 2017 build MS. On the back of my rear view mirror pedestal, I have some vertical slots and I would like to know what they are for. I went to my SC and many of the inventory cars don't have them. There is also a little hole on the back of the mirror itself that looks like a sensor. The folks at the SC could't tell me what they were. See attached image. I want to install a DashCam but don't want to cover up anything important.