UK 300 no'30

Hi all. Picked my car up yestarday,new to the subaru I have a 2001 uk300 and when driving my boost gauge doesn't work at all and you can here what sounds like a massive boost leek so started to investigate and found the solenoid and 1 pipe is not connected is this right? Iv attached a picture but it's the same solenoid as my st had and no pipes were left off on that?

Hi all got myself my first Scooby yestarday a bugeye UK300.i new it needed a bit of work before i got her and thought this would be the best place for all my info.only other turbo I have owned was a focus st old.iv tryed adding a pic(if iv done it right)