Hi Robert,
Regarding DataContext of the LineConnector, be default if you set DataContext for the object, the Content property of the element can be used to refer the business object. In your scenario, the LineConnector will not have the reference of the Business object. You can get the Businees object details by referring LineConnector HeadNode and TailNode property. Please refer the following sample code snippet.
Code Snippet:
object busineesObject=(line.HeadNode as Node).Content;
Here Line is the Instance of LineConnector.
If the above solution does not meet your requirement. Kinldy provide us more information about requirement such as Sample/Video. So the we can investigate more on you requirement.
Please let us know if you have any queries.
Regards,
Sundar M.