When user hovers a connector and pastes a connection, the pasted connection should be attached to the hovered connector.

You can check the Diagram SDK sample in GitHub - "PasteOnMousePosition" whic demonstrates this functionality.

https://github.com/telerik/xaml-sdk/tree/master/Diagram/PasteOnMousePosition

We are marking this feature request as declined - the code in the SDK sample is the preferred way to go instead of built-in feature.