I just went and had a look at mine and you need those bits in version 1,but I cant work out what those square plates listed as "2" are for.
The bits in version 2 are also needed and are the parts the screen fits to.
But the pics dont appear to be from a R3.A few of the other triumph models,like the speed triple and thunderbird have similar kits and they are probably using one pic for all.
I think there are better pics on Triumphs home site.