Is there an additional reverse sensor input (2004) in the factory stereo wiring harness at PIN 20? I've seen a lot of posts about the DKP blk/pnk wire, but I found a few pinout diagrams that showed PIN 20 being for rear parking assist. A lot of other pinouts posted show PIN 20 being unused, buy my truck is wired to PIN 20.

I've connected the reversor sensor wire from my new X910BT to this PIN. Guess we'll see if it works...

Anyone else do this?