Had a look in the box and its very different fitting system compared to youtube vids of the 620. There are no colour brackets, the manual looks very different, it has small screws like 10mm long and i have no idea what there for, they look like psu screws kinda and they are not in the manual, the same for this ring thing which doesn't fit anywhere and isnt in the manual either.
I think i know how to fit it all tho but this ring thing i hope its not vital to the install lol or them 4 tiny black screws. Also yeah i looked at amd and intel installs instructions and they arnt mentioned or illustrated either in any of the steps.