Pierburg carb evaporation fllter pipe help

[tookie]

does anyone know where all the pipes go to on one of these ?:http://i80.photobucket.com/albums/j165/andyb5412/5c02_1.jpg

[leggattr]

I believe the top goes to the return to the tank, the bottom is the feed to the carb and the other is the feed from the pump.