Hi, I finally got around to try to fix my reversing sensor. After taking out the boot lining, I cannot see the unit. The only cable from/to the rear bumper comes through the O/S and travels along the O/S. I thought that the unit may have been hiding behind some metalwork, the first thing I removed looked like an alarm (?) and there's something further in but I cannot reach it. Is this the unit I'm looking for? Sorry about the quality of the photo - it was a hurried shot.