This allows you to connect the tug to the Cochin small barge from imperialterrain.com. There are two versions. The parts version will print without supports and superglued post print. The full version requires supports. I used Cura standard supports with the touching buildplate only option. If the connector is too loose to slide on the barge, add a bit of superglue inside one side of the slide-on piece and let it dry COMPLETELY.