Sorry for the late answer.
Maybe now it is obsolet, but there are 3 things, which have to come into the carb box out of the frame, passing the air rubber tube.
The both tubes, gasoline and oil and the choke cable.
In my opinion you have to ensure first a smooth way for the choke cable, then you have to decide, which way for the both tubes (oil and gasoline) is the way you prefer.
It depends a bit on the stiffness of the tubes.
I don't really know, wether there is a real fixed way to do it. Pretty sure for the choke cable, but for the tubes? It should depend a bit on your feeling, what is right.