I'm trying to figure out what i need to install a sony xav-ax1000 in my 2005 nissan altima. I've searched the internet, but i can't find much on connectors. I know there are four connectors, two of which are for audio and I have ordered a 70-7551 adapter for the rca connectors on the ax1000. that leaves two connectors with which i am lost. i would be grateful for any help, and if there might be a better forum for this issue.