I am having a bit of trouble with my rear suspension. The problem is that yesterday I put my suspension to service high, and when I put the slider back to normal driving position the rear of the car didn't come down. Now, I had this exact problem before, but only with the front of the car. And when I got under the car, this

is what caused the problem, it just came of...
Now, I'm not sure if this might be causing the problem again, I checked the one in the front and it didn't fall of. I watched a video on youtube uploaded by this forum, and the guy said that there is another one of this things in the back, if I understood correctly
Thanks !