Japanese katana heavy fighter

I was thinking of using other fighters for my Japanese fleet (maybe the
NI light 
fighters and some other (NSL?) heavies), but I'm thinking I like the
ones I have 
more than I used to.

I'm not sure which way is up on the katana.  I know, I could put them
whichever 
way I like best.  But I'd like to know which way they're supposed to be.

Are the things sticking out from the wings and going back to the tail
supposed to be 
underneath the wings, or on top?  I can't find any pictures.

andy