Handlebar Plastic Insert

Hi all,
So I was messing about with my stock bar end cap for my 2023 Speed Twin 900. There is a little plastic insert piece that I was messing with, set down and promptly lost (not organized in my garage). I am still looking for it, but was wondering if anyone knew what the part number is or where to find one. I have been searching for one online and cannot find a part number or even a schematic that shows one. Any help would be greatly appreciated. I have attached some photos for reference.

Thanks,
Chris