It goes to the inside (dash) see pictures. Has a couple spot welds top and bottom so you will need to grind flush so it does not interfere with gasket or trim.
http://www.flickr.com/photos/advance-design_parts_co/8129121705/in/set-72157631867396207
http://www.flickr.com/photos/advance-design_parts_co/8129063409/in/set-72157631867396207