Petrol Tank Breather & Drain Hoses

[DarrenSV650S]

On the bottom of the tank there was two hoses, but I can't remember which was which. One was just a single hose, the other went into a T piece and then followed the same path as the first, down the side of the bike.
Does anyone know which is which?
I've labeled them in the pic as A and B. Which one goes in to the T piece?

http://i88.photobucket.com/albums/k164/DarrenStewartTait/DSCF00093.jpg

[DarrenSV650S]

please help:smt089

[maff]

check the diameter of the tubes to the bits on bottom of tank. there both diff sizes

[DarrenSV650S]

Ahh didn't think about that