Mine isn't a Vegas...but have a look underneath to see if it's similar
Mine had to attachment points a few feet forward from the rear bumper on each side...on the frame rails. Tabs with mounting holes
And a third attachment point near the bumper on teh center line. It is a piece of threaded rod pointed down.
Ordered a factory rack from thor through the dealer
In the picture of the rack on the counter, the sticker with barcode is on a plate with a hole in it that mates up to the threaded rod at the rear.
Sorry, the installed pic is the best I have of it.
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