Gen 2 Avin 10.25 Struggle Bus

[cjm0987]

Just got this unit in the mail as I primarily wanted it for google maps functionality and touch function. Thinking of just straight up returning it and saying forget it. Got most of it figured out but I don't see where the video feed from the backup camera that's already on the car would be and I'm thinking this unit wants it plugged in. Also ordered a front camera to assist me with parking but that ones probably straight forward. Anyone else have experience with avin and an f80?