Fuel Tank - Again !

I have removed the Fuel Tank to de-rust it as per my previous posts.
I cannot see where there 2 fuel pipes pass through the frame to the carburettor.
I can see a shaped hole but this does not seem large enough.
Can anyone advise?
Also, I have a ST70 manual but it does not show any of the above, again, can anyone advise ?

Are you trying to put it back in?

They just route through the frame and out underneath the air filter.

Thanks for your reply.
Another silly question - The Reserve Pipe outlet is marked on the Tank, Which inlet does the Reserve Pipe fit onto the Carburettor-upper or lower ??
It is not marked !
Not used to all this modern M/Cs!!! I could trip a Lambretta 150 LD in the 1950's - no problem !!!!

I normally mark the pipe when I take it off so I know what way it goes back on.
I'm sure I wrote it down once too, if I did It will be in my shed somewhere, I'll see if I can find the notepad.

You could try blowing into the inlets?
I would have thought you would be able to work it out that way?

Thanks for your reply again. I had considered this, but thought there might be a more obvious and less "energetic" method !!