shock absorber front pk50s 82'

Hi there,
I've just received al my goodies from sip
But i've got a question regarding the shock front absorder ( carbone 65020000 )
The pivot hole on the absorber is about 15/16mm where as the pivot on the suspension arm is about 20mm.So it will not fit.
On the site however it was marked that it would fit for my model. Did I miss something ?
Is there another model ?

thx in advance

ad van beek