The replacement upper ball joint is mounted underneath the upper control arm, the boot is then placed on the ball joint, and then there is a sheet metal boot retainer that is plaed over the boot to hold it in place. The bolts that hold teh ball joint to the arm also pass through the boot retainer to hold it in place. If you do not have 3 separate parts in the box, then the ball joint you got is missing something. You may want to take it back to teh parts supplier and exchange it for one with all of the pieces...
Hope this is helpful; if so, please click my accept button! Thanks!
Service Manager
25+ Years experience as a professional working automotive technician; ASE L1 master technician