Reseat the ball cup on the steel ball for the turnbuckle end. Its not on properly.
Turn the turnbuckle so the longer of the flanges on the steel ball is facing the drive shaft where the head of the screw would end up being when you screw it in. Before doing that, grind off the flange I circled in red, put a small washer on the screw, and then screw it in where the washer would butt up against the ball of where the flange that you ground off used to be and the head of the screw. Basically after grinding off the flange it would look like a steel ball with a hole at one end and a short flange with a hole at the other end. I used a 2mm button head screw because the head has a very low profile.