It doesn't matter which way you fold it! the outcome is the same. Try imagining the material the cube is made of is transparent so the symbols can be seen from the inside and the outside. (probably more confusing to some, but everyone has their own way of looking at these)
also given you have pencil and paper in the NATS tests could you get away with tearing out a rough shape and folding it up to make the cube? there are 20 q's (if memory serves correctly) on each net so it would/could be beneficial given the time constraints.
just a thought.
