Oops, speedfight fuel tap pipe question

Ive just taken off the fuel tap from the bottom of my speedfight tank. Like a fool i didnt see which pipe goes to which spigot. There's only two so does the vacuum pipe go on the top spigot and fuel pipe from the bottom spigot? Or t'other way. I dont want to guess and run fuel down the vacuum line.
Cheers

 

vac to the top, fuel to the bottom

 

Thanks, better to check than hope i'm right.