AndoverS7, you're totally right! It was item #22. The part number was on the item as '8V0802847A'. I googled this part number and it's a part called 'rear jack socket'.
It's purpose is:
"The pinch welds, or seams, on your vehicle are a great lifting point on your vehicle, but can start to sag and cause damage to the body from the jack itself. This jack socket helps prevent that damage by providing a contact area for the OEM or aftermarket jack to keep the body of your vehicle protected and give you a flat surface lifting point to easily jack up your vehicle. This jack pad socket is for the rear of the vehicle and fits on the right side."
https://www.ecstuning.com/ES2733037/