Note: As of version 1.0, connected Sagans ONLY appear in your Saganworks and do NOT apply to embedded or shared Sagans.
To connect two Sagans, simply drag a Sagan in Map View towards another Sagan you wish to connect. You will see that the Sagans snap together as they get close to one another:
Upon entering the Sagan, you'll find that the door is now labeled with the connected Sagan:
To enter another Sagan via a door, double click the door; this will exit the current Sagan and load the connected one
Note: As of v81, connected Sagans cannot be shared as groups. When sharing a Sagan that is connected to another Sagan, only the selected Sagan will be shared or published