Does anyone know what this pipe is?

[BlueEyedBoy]

I was replacing some of the breather pipes on the car and came across this. It looks like it should connect to something but I can't for the life of me work out what. There is no obvious disconnected sleeve and the end of the pipe looks quite strange. I am thinking its possibly some sort of expansion pipe?

Does anyone know what it is and if it should be connected?

Car is SAAB 2001 9-3 Aero coupe.