I'll look on the web for you to see if there exists some fitting instructions, Also, without included instructions, you can't know if anything is missing. Puig should have been a workable solution. I had considered that option myself a while back.
Interesting in that My Dio is booked for a 4K service this Thursday. Two years old and a fantastic little scooter for inner metro work. It just seems to get better. Even though it is not due for a replacement plug I will seek to have that changed also.
There are heaps of Dio, Suzuki Address and the Sym Orbit 11s operating around these parts. And it no surprise to me either. Not a single one with a screen though. Lots of food delivery boxes instead.