That's what I concluded. Probably the same for all Z3s but there may have been a change along the way, albeit unlikely for such a part.I think it's item number 11 on this page. The little end bits are also there.
https://www.realoem.com/bmw/enUS/showparts?id=CH72-EUR-04-1999-Z3-BMW-Z3_19&diagId=54_0194