I purchased this vehicle used as I'm a volvo enthusiast, from the moment I purchased it the back up camera did not operate, I went to the back of the car and opened the back left electrical compartment and noticed this green cable is missing. I have taken picture of all the settings and camera options and I believe I have enabled everything correct, no matter what I do I get the error "camera unavailable" is this related to this green cable? If so how can I plug this in? I've looked around and seen no place to plug in. Also, if this is equalizer related should I purchase a 'Genuine Volvo Equalizer 31471726' and where would I connect it? All help is appreciated, thank you in advance.