Help connect OEM reverse camera to aftermarket radio

I just installed an aftermarket radio and have been having trouble figuring out how to retain my back up camera.I have been do a lot of research and they have been helpful on what I need but never give me enough confidence to snip wires.

I have bought a 12v to 6v step down and a RCA cable.

I located the camera harness (16 pins with 5 wires) but I can’t find any diagrams on what those wires are. I’ve also been trying to find the reverse trigger wire because most tutorials say I need it.

I attached a pdf / photo with all the wire diagrams I have, can someone help me figure out how to do this?

btw: I have a 2013 Prius not JBL with nav

 

Update: I have figured out how most of the process but I still cannot figure out what the wire colors in the camera harness are. There are two red wires, an orange, a white, and black wire. A total of 5 wires in a 16 pin connector, all the forms I see only talk about 4 wires.