As functions : AddPushTarget and AddSecurityGroup. and connect security group will/might be obsolete or the Connection Manager or clients would not call these methods due to the difficulty( in the SKS server) in synchronizing when multiple clients are updating it.
The solutions is that the Connection Manager updates the PubSub configuration of the SKS server using file operations that provide a locking mechanism( PubSubConfiguraiton Object + CloseAndUpdate ). When the file is opened with write permissions, the SKS configuration( that contains Pushtargest and security groups) is updated. Therefore, the suggested sequence for the Connection Manager to update the SKS configuration is as follows: open the existing PubSub configuration file, apply a lock, write/update the SKS configuration, then close and update the file. We should update the diagrams part 81 Interaction with SKS ( E5/E4)