Has the new tank cycled already? Because if so you can just do a direct swap and dispose of the nano tank's water. Easy peasy.
If not, It's not much more complicated, just much more involved. You'll need to carefully transfer everything over, being careful not to disturb the sand as much as possible. Put as much of your nano's water into the new one as you can and arrange all the rocks. Fill the rest of the way with new salt water and begin transferring everything over. I always like to siphon off the top layer of sand and spread it on the new sandbed just to jump start the sand bed colonization.
The important thing is to disrupt the beneficial bacteria as little as possible. If there is no LR
in the new tank already, or it is already cycled, then you shouldn't have a new cycle because there is nothing to die off.