Hello, I have an inexpensive wireless backup camera (vr3 3.5" lcd) that I want to install on our 2004 Volvo XC70. However, I need to wire the power to the unit from the reverse lights so that it will power on when the car goes into reverse and I've never done anything like this before. Can anyone who has done something like this give me some pointers?

Do I need to remove the paneling on the inside of the lift gate to get to the wires for the reverse lights? How do I do that?

Thanks in advance for any help you can give me!