Funny you should ask this. My SE didn't come with rails so I just bought some from a salvage yard on eBay and they're going to be delivered today.
I didn't take off the roof moldings yet, but from looking at parts diagrams I think that there are some brackets w/ bolts to hold the rails that are welded to the car.
A friend of mine with a welder is going to help me out, once I gather all the parts I need. Not sure when that will be, but I will definitely post updates when I do.
One of the roof bracket parts:
View attachment 973
Roof Luggage Carrier Side Rail Bracket (Right, Front). W/O SUNROOF, #1. W/SUNROOF, #1. 2021 hyundai Venue. Genuine hyundai Part - 67341K2000 (67341-K2000). Ships from Wholesale Hyundai Parts, Lakeland FL
www.wholesalehyundaiparts.com
A picture from someone who
removed the rails from their Kona:
View attachment 974
Has anyone removed the roof rails and replaced them with the strip from an se model. Not a fan of the rails. It makes it hard to clean the roof.
www.hyundai-forums.com