Going back through some of the threads it appears the conventional wisdom is to have the open end towards the intake side. To be honest I never gave it much thought until I saw several years ago another thread saying to install it towards the exhaust side so I started doing it that way. I've not had any problems in that department. The factory shop manual says to replace the masterlink each time which makes sense if it's the original one. The one failure documented was not due to the direction but rather the circlip being loose and going on to easily. He learned the hardway to replace it. So no matter what you do I would highly recommend you spend the extra $5.99 and get a new one.
The passenger seat is 15 miles an hour faster than the drivers seat.
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale