All 2st WR360/ wr250 tranny swap, missing shift drum parts

I am currently doing the 6 speed conversion to my 2010 wr250 using the wr360 tranny. I am sure I am missing a part that holds the star wheel to the shift drum. Is there ment to be a special washer in between the screw and the star wheel? I had a look on the parts diagram but it was not clear to me if it was a normal washer or a special one.

Hope someone can help or has a photo.

Is this the one behind the cap head holding the star shifter,if so its a normal washer with a dish in it,i have one if your desperate.hope this helps