OK... I solved it!Can you identify which pin on the canbus decoder is connected to the reverse wire? Seems like that might be redundant?
The only repo I've found has been in this massive russian thread: https://4pda.to/forum/index.php?showtopic=1000996&st=5000
Seemingly only modified firmware (not sure what's been modified) or factory 360. I did come across a June navifly stock firmware buried in the thread and updated my unit with it. Not easy to search the thread for me since it's in russian, but it's where the bulk of the info is.
edit: you've played with the factory settings, toggling off all the 360 ones? seems like it's being actively discussed in that thread right now
I saw my old Dasaita PX5 "reverse cont" wire connected to pinX on the canbus connector AND the power connector. (I think its Pin8 as u shared above)
Canbus connector on the new Mekede is also the same (standard), so I followed that pin to the power connector. I cut that wire, and connected it to my cam out. Thats it!
Now.. this reverse wire is in pin 3. The pin location on Mekede/Navifly description is pin 2. Its all wrong. lol
Anyways, I still don't know what the "cam12V" does. Probably for different car configurations. In the process, I even cut the VCC and headlight sensor too.
But all is good now and I thank you for proving me with the wealth of info and thoughts!