Heater core - need some help

Replaced my heater core yesterday. Fan isn't working and I have the connection shown in the pic. Anyone know where this connection goes. /[url=http://pics.tdiclub.com/showphoto.php?photo=93144&title=heater-core&cat=500][img]http://pics.tdiclub.com/data/500/thumbs/image64.jpg[/url][/IMG]

Never mind - had to plug the fan back in. And the connection in question is for the cigarette lighter.