to establish a SCCP connection you have an exchange of initial messages:
1) SCCP ConnectionRequest (it contains a local connection identifier, let’s say for example 0x01)
2) SCCP ConnectionConfirm (it contains both its own local connection identifier, let’s say 0x02, and the destination one, 0x01)
Then each following messages will contain the destination conn id, 0x01 or 0x02.
Hope this can help you,