Virsa CC 5.2 Backend sync - No destination system

I have installed Virsa CC 5.2, I am trying to complete the post installation steps as mentioned in the guide as:

Config tab -> Backend Sync -> Rule Sync

But no destination system exists in the drop down list.

There is only one system configured. Also, would like to know if any extra RFC/JCo is required apart from the ones mentioned in the guide to get this functionality working.

This is Urgent