After designing connections inside STAAD.Pro. From the finished design, export ISM to Pro-structures.
Interesting, there is a similar idea posted, STAAD,RAM Coneection and ISM - STAAD - RAM | STAAD | OpenTower - Bentley Communities, and as I confirmed there, we recently introduced a facility that allows any connection tag to be associated with a specific RAM Connection template. The tags are include in the ISM interop and available in the repository. Detailing applications that consume the model can then use this information to apply the details associated with the tag.
We are always curious to see how far engineers take the connection design. Are you involved in the design of the steel structure and the connection design where you work? How much detail do you provide in your construction documents? Or are you producing fabrication-ready documents?