See them seat tracks on the floor pans? That railing looking stuff on there? That's where the front seats slide on.
Our old ones are better quality and are still in pretty good shape, so we're going to remove these cheap seat tracks and re-weld the old ones into the same location. The tracks are just tack welded into place...shouldn't be to hard.
I can't see any snapfish pictures at work. I will have to check out the blog when I get home!