There are 2 gas lift struts (one on each side) that attach to the outside of the top lift frame in the top well. My SSR is missing the one on the left side, and one end of the strut on the right side has popped off it's mount. What are they for, and are they necessary for top operations? They are also very difficult to remount once one end has popped off since the strut expands about 1/4 inch past the mounting studs. Has anyone had experience with these struts?