I always try to take a picture with my phone cam before taking something apart.After a few 100 miles I pulled the bag out with lug wrench as pictured and checked lugs were snug. A couple turned a bit but all good. Behind jump seat in my XLT. Cant seem to get wrench out without taking it all out. Hardest part is figuring out how to put it all back together.
Good news is its a nice secure package and it doesn't rattle.
Note: metal collapsible chocks are nice for storage space.
If somethings missing dealer should be able to hook you up.