Servicing a Vuelta XRP Disc Hub 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.
I don't have specific experience with this one, but the pictures suggest it works one of two ways:


From where you're at now, you bonk the end of the axle on the non-drive sufficiently hard and the axle slides out, possibly taking the freehub with it, or if not then letting it be removed.
You put the 5mm allen in the drive side end and a cone wrench on the bit with the cone wrench flats next to it, figure out if it's a left or right thread, break that connection and unscrew it, and the hub comes apart that way. I think this is more probable.