S70 98 - Rear View Camera, Reverse Wire

Hello,

I already know I need to connect the wire to the blue wire going from the big chunk of wires under he dash to the harness on the left side, to the trunk, to the reverse light bulb.

Now the question is, is there a way to easily access the blue wire from the left side harness somehow? I would like to avoid passing a cable from the trunk, I would prefer from the interior.

thanks for any hint