I believe the late 2005 was a bit of a crossover to the 2006 facelift model so you may find that the lights are factory fit 2006 ones, no idea how you will find out other than the original build sheet. The lack of headlamp wipers would indicate...
I have limited information on it but you have the main motherboard on top of the battery, and just behind the lense on the device there is a second smaller one which controls the camera.
We just pushed it forward and it came on
Scratch all that , we managed to fix it.
The motherboard that the actual camera is connected to had a poor connection that when pushed forward made the camera work.
And the fault code (companion camera input failure) has disappeared.
Sorry I have no idea how it connects to the car but I doubt it's on the canbus., although it may send the images over the canbus. I suspect it uses RF but I've never been able to find any info on it.
What's the canbus error you're trying to fix?