Holes in Wings
I believe the plans do show cutting a couple of holes in the top sheeting for routing fuel lines and servo leads. Anyway, that is how you do it.
I'd recommend that you go to BVM's website and download the BobCat trimming article I wrote. I give all the control throws and set-ups I use in the article. Also, I'm working to get the TX set-up I use available for download using the JR Datasafe.