Mine was fitted by dealer so no instructions and no clips?
I had to take it out to load some furniture and it was a bugga to get back in without an extra pair of hands.
I found (on my MY15) that you can only put one of the 3 footed brackets on first, you can't get it in if you put both brackets on. Then fix the second bracket. Put the J rods through the holes near the floor and tighten the turnknobs. Make sure the guard is centralised as the J rods can pull it off centre.
Hope this helps.