According to the pic, the part you are measuring is the end of the spring bar where the chain that suspends it from the trailer 'A' frame is. When you are setting up the system to achieve the correct amount of weight transfer, the tension bars need to be lifted by the chains to create the correct amount of tension on the bars. In your pic, the bar does not appear to be under any tension, which is why the end of the bar is so close to the ground. The proper way to create this tension on the bars is to use the trailer lift jack, once the coupler is locked onto tee ball, to raise the front of the trailer. Because the trailer is coupled to the tow vehicle, it also raises the rear of the tow vehicle. This causes the free ends of the spring bars to pivot up toward the trailer frame. This causes the length of chain necessary to catch on the support hooks to shorten. Once you have raised the ends of the spring bars enough to be able to hook the correct chain link on the hooks,(the correct chain link is determined during the initial setup process) you then lower the trailer jack. As the trailer tongue lowers, the chain connection to the spring bars now creates the tension on the spring bars, which then forces the tow vehicle frame to rotate across the rear axle and force some of the load to the front axle. If you have the proper chain link hooked, the tension bars will be under a lot of tension, and the ends should not be close enough to the ground to hit (under normal circumstances). As for changing the position of the ball mount/hitch, if the trailer is riding level with the current setup, flipping the hitch bar upside down will not change anything, because you will still have to remove the ball mount and then reattach the ball mount in the correct mounting holes, so that it still rides level, which will be at the same height that it now is.
Again, I strongly suggest you carefully read the manual, several times if necessary, until you fully understand how to correctly setup and use the system. If you don't, you stand the very real risk of having a serious failure of the system or getting hurt.