Hello i have a 1990 sporster 883 standard i need to replace the upper shock studs/bolts i took off the back fender but i cant see anywhere to unscrew the studs anyone know what i have to do to replace them? The back side almost looks like a cap but from what I can tell it goes all the way through and maybe just pressed in? I have looked through the manual and cant find anything about it.

Any advice would be great. thank you