Looking through the install info for the X920BT I just purchased, I saw a note that caught my eye. I do not intend to install a reverse camera, but there is a note in the install docs that basically says it is also used to help the GPS tell if you are moving forward or backward and help with positioning. I hadn't planned to connect this wire, but now I'm wondering about it. Portable GPS systems I have used have not had issues with this. Is it a big deal and worth hooking up? Or is it considered overkill by the majority here? Thoughts?
Adam