Installing Backup Camera in 2007 Tacoma

I just recently installed a Pioneer AvicX850BT head unit in my 2007 Toyota Tacoma. I bought a back up camera from Amazon. I was able to power the camera off of the back up light from behind the tail light assembly. I now need to locate a back up light power source inside the truck to trigger the head unit to bring the back up camera up when put in reverse. I have looked at other threads but have not had any luck. My truck did not come with a back up camera so my wiring seems to look different than some of the threads I have found here. The wiring inside the truck is not the same color as it is by the tail light so I am at a loss. If anyone can help it would be very appreciated.

 

I'm doing the same. Have you had any luck getting an answer?

 

https://www.yotatech.com/forums/f96/2006-tacoma-reverse-camera-install-249968/