backup camera

I bought an Android Stereo from Amazon (Pumpkin 8.0) very happy with stereo. I have been able to wire and retain steering wheel controls and have found the reverse camera trigger cable. I have done all this without a harness. Does any one know which are the wires that tap to the OEM backup...

I recently purchased a 2015 Toyota Corolla LE Fleet. The car is equivalent to a standard 2015 Toyota Corolla LE except for the following: Wheels are 15" steel (instead of 16" on the standard LE) No backup camera I wanted a backup camera so I had the Brandmotion 9002-8530 OEM Backup Camera...