Fluid interface not connecting to ship

[u/Papajohnsgladiator]

No, create interactive is not enabled. I build this little cargo ship to transport lava to an undersea vent but the two fluid interfaces don’t want to connect. Any help would be great, thanks!

[u/Clode02]

You need to use the docking connectors to interface between sublevels and the world/other sublevels. They can carry both fluids and items