The "buttons" belong behind the ball in the tie rod ends. They are a fairly close fit, so they can't be allowed to cock. You'll notice that they have the same curvature as the threaded end... and together they can be adjusted to a good fit on the ball.
Too bad you didn't have more time and come to spend a little time with the rest of us at the camp site. Larry is a very good friend and will be coming to our home show next weekend for a continuation of the festivities at Gibsonburg, OH.
Larry picked up his new Cub in Wisconsin and delivered it to Portland just before the show.
Larry's wife, Barb bought her Cub the week before CubFest 2003. It was among the 12 ATIS tractors displayed as a group.
Here it is at CubFest 2003 at my place: