Black plug on the sat nav drive loom

Hi all

New owner to a L322 so go easy on me.

The sat nav drive is missing from my range rover and have bought a MK4 unit to replace. from the looks of it, the whole mount is missing too.

However, there is a extra plug left over (is is a black plug) in the loom. The blue and red with GPS reciever have been plugged in.

can anyone advise me where this extra wire plugs in and where might this be located.

I am also worried where it plugs in maybe missing so could anyone please advise what the part maybe.

any links or pics would be smashing.

thanks in advance

Can't remember if I put picks of the connections in here...but take a gander, it may help!

http://www.landyzone.co.uk/lz/f10/2002-2005-sat-nav-upgrade-241877.html

No luck in the images.

Range Rover L322 Sat Nav System Wiring Harnes YMP000090 | eBay

Its the plug in the top left hand side.

I dont have a clue as to what it is.

Sorry

should have said in the pic.