Which tekonsha trailer brake harness for 2017 Sr5?

[spetka]

I have a 2017 SR5, trying to hookup my Tekonsha P3 brake controller. Looking on Amazon, every vehicle specific one says not compatible with my vehicle. The truck came with the vehicle side harness, but I was hoping to just buy a plug and play one. Do I need to just get a pigtail and solder this on to the one that came with? Or is there a plug and play out there? My searching didn't seem to come up with a clear answer. I found a few different model numbers, some have extra wires?

Thanks!

 

[Simonpk]

I have 2014 SR5 with Tekshona P3 and the harness was 3040 and hooked up perfectly to the Toyota Oem end - take a look on etrailer.com as it has the details you should need