Not sure what that means. There is no axle nut per se.
The derailleur hanger has a threaded part that inserts at the right side of the fork (and is held in place by a small counter-sunk screw). It's not a nut, but it is threaded to take the thru-axle.
I mentioned this in an email last week or this week. You'll need to remove the small counter-sunk screw near the tip of the right fork arm to then mount the derailleur hanger back in place, and secure it with the small counter-sunk screw. After that you can mount the wheel and put the thru-axle in from left to right - it screws into the threads on the right.