Sorry that is specifically for a 2009 JSW.
I see you've successfully installed a BUC in an '09 JSW. I assume you needed to know this for the trigger for the BUC. Did you ever get the diagram?
I'm soon to try a BUC in my '09 JSW. I also want to rig up a rear fog ligt. I did both in an '11, but I've had a much harder time tracking down info on the '09 JSW's electrical system. (I've got a Bentley manual that should cover this, but I've not found it to be real helpful/user friendly so far.)