Bit of a long shot but can any one help me with my left over pipe

[Fugglequest]

Just coming to the point on my rebuild and got these guys left over in my parts bin and it's been that long now i cant for love not money remember where they go

The top one
I've got no clue looks like its had fluid ran through it and jm guessing its something to do with coolent.

The middle one
I know comes from the stock airbox but dont know what it goes to.

The bottom one
Looks like a question mark but not sure on where it goes

I know it's a real long shot but I've spent the last few hours looking in parts catalogues at the exploded diagram trying to spot them and seeing if I cant spot anything obvious on the car

 

[rx_dreamer]

Is the question mark from the expansion tank to the throttle body?

 

[Redgti]

Yeah that’s the only one I can call off the top of my head