I did not cut or splice the factory wires. All of the wiring was done using the Metra wiring harnesses. These two harnesses just plug into the factory wiring harnesses, which then connects all the new wires into the car's system.Regarding the backup camera installation... did you have to cut and splice the factory camera connection with the proprietary connection or are you wiring it some different way?
The gory details are all outlined above if you go back and read the sections on the backup camera, namely 4, 7, 8 and 10.
If you have any specific questions please ask away.