In the case of many sources and queues are connected random sequentially, when fixing the connection or modify the connections, it will be good the clicked object's connection black color to be highlighted to other color like red or green.
I found it is not possible in current 17.0.3.
If the complicate connections with croslinked would be checked, the objects should be moved here and there or open the property window and check the port connected object names.
It will be very troublesome and difficult.
It will be good and for users to highlight the black color to other bright color.