Cable Saver Minn Kota Ulterra

I am having a very hard time installing this cable saver on my Ulterra. Seems the lower part that goes down on the propeller end wants to be loose no matter how tight i tighten the screws. and the top is the same way. I have lowrance hds units and have 2 transducers mounted on the bottom of my trolling motor.

Is there something i am doing wrong? Looks like the bottom big end of the mount, the pieces of the mount are touching one another preventing any more tighting. The smaller end holding the coiled transducer cover is not touching the mount itself. Hard to describe what I have going on but perhaps some one can offer a solution.