I can't for the life of me figure out how to get the freehub body off of this hub. Everything I can find online about the Vuelta hubs says that I should be able to stick a 5mm hex key into both sides of the axle and just loosen them, but this hub only has hex on the drive side. When I try to loosen that, only the non-drive side nut comes off. This is a 2014 Vuelta XRP wheel. Thanks for any advice.
Update: The second part of Nathan's answer was correct. When I put a 5mm wrench in the axle on the drive side as well as a cone wrench on the not lockring on that side I was able to remove the nut.