In my previous car , a 4/4, there wasn not one fitted. I fitted one behind the dash screwed to the ash frame on left hand (passenger) side. I used the feed for a radio ( none in the car! ). An inline fuse put in too. A pretty simple job.
On my current ( no pun intended!) car there is one in the glovebox. I intend replacing it with one under the dash as it is more accessible then. It will have a usb socket as well.
