1)Red cable is connected to the backup light ① " ";
2)black cable is connected to the backup light ② "-";
3)The reversing detection cable Brown color is connected ④ to the red cable which extending from the video input cable ③ ;
4)Red cable is connected to the backup light ⑤ " ".
How can I find wire number ④ on the picture?
Looking at the power plug from the angle on the photo, the third wire from left to right (it's usually brown or pink) is the ④ wire we're looking for.
