can anyone tell me where the top hose goes that is on the plug thing?(above the top one thats arrowed) as this was connected to the turbo but i am trying to plumb it as per this picture.also what hose do i spray carb cleaner down to clean it? thanks bryan

 

That smaller diameter hose goes to one of the three on top of the manifold, dont think it matters which Carb cleaner through all hoses from the BCS and the BCS too if needed

 

excellent mate,thanks very much