If it’s like my 2017 Palazzo ( slow rise type ) look up at roller bar you may see 2 black latches one near each end. Use a small flat head screwdriver to push the spring loaded clip away one side at a time ,let it drop a little do the other side. They will roll forward after second clip is released. On the roller there is a black wheel (looks like a gear ) on the other side a clear one , remove 2 screws on clear side , wiggle the bracket off so you can slide the roller tube off. That exposes the spring that just screws on the cone shaped ends, I did the one that is black gear side first then screw the cone on to other side. Slide the tube back over cones aligning notches in tube reassemble. When placing assembly tip the back in first to fit into notch push front up till in clips in. It’s not as hard as it sounds. You will need to put a few turns on roller like pretensioning before putting sides screws in