Typical internal dialogue installing an AOS includes "you know, having a third hand sure would be helpful right about now..."
Attaching to AOS first as I recall is preferred route - not to mention benefit of installing one clamp completely outside engine bay. The Porsche repair manual calls for, and of course dealers sell, an extremely overpriced lube for the job. A loving dealer, if they even permitted you to buy, would apply generously before charging to minimize pain inflicted
A loooong time ago, I inquired and it was something ~ $30 for a tube size no larger than TSA friendly toothpaste... of which you only need a pea sized gob or two. Needless to say, I declined.
A schmear of motor oil just inside of tube opening is equally effective for encouraging it to slip on so you can attached hose clamp.
Good luck
