XPLR Hanger bolt “play” – How to replace?

Hi Bikwrenchers

My Ridley Kanzo is fitted with a Rival XPLR. I have noticed “play” for the bolt that connects the derailleur to the hanger. (Seems to be called RD-SPP-A0? https://www.sram.com/en/service/models/rd-spp-a0 ) It is influencing my shifting behaviour and I want to replace it rather instead of buying a new derailleur.

I see spare parts are available, but don’t seem to find a way how it should be replaced. Any tips, video’s or expierenced experts that can help me ahead?

Your help will be appreciated!