[SmellYaLater]

I need to order this part (number 15):

http://cf-design911-2.datadial.info/uploads/diagrams/105-10_944_1989-91.gif

It can be seen here (NOT where the arrows are - it's smack in the middle of the pic):

http://www.pelicanparts.com/techarticles/Porsche_944_Turbo/28-WATER-Coolant_and_Radiator_Hose_Replacement/images_small/pic04.jpg

What the hell is it called and what part number do I order?