rattle

Hi guys, please could any gen 2 owner here check whether they have same rattle on the same spot as shown in a video? Today I've noticed it, rattles when gently tapping but it does stay in its place. Also I've noticed the weird small cutout that looks that something was attached to it but its...

I got again annoying rattle from rear bumper. what were the mounting points that I could check? issue was last time fixed by the service but now I don't have need to go there for a while so would check this at home garage. Thanks for any pointers.