So I purchased a factory roof rack from a junk yard near me. They told me it has all of the mounting hardware and to me it seems like it does. I have two questions: Where is the proper mounting location? How is it attached to the roof? Do the screws go right through the roof or are they screwed into threaded inserts? Any pics or info would help. Thanks. Heres where I mocked mine up after looking around online a bit.