Just to add a note this also works for the RT1200 as well
I've just fitted one to my dads 2013 pre LC model using the socket under the pillon seat, just incase any RT owners read the thread..
What all are you looking to run off of it? if its just the likes of an autocom/kenwood setup i just wired into the autocom from the 3 way using crimp bullet connectors as the socket is never going to be used and the autocom/keenwood aint gonna pull 5amps
i have a 12v socket stright to the battery for the likes of the compressor etc
Just a couple of USB sockets, one to the front for camera and one to the rear to keep battery pack charged and a phone.