How to get Annotation Connector from Simulink Model and how to set his color and width?

In Matlab R2015a Annotation Connector is introduced. It is a connector lines between an annotation and a block. We can set color and width from its context menu. but How can we set the same from command line? and how can we get the Annotation Connectors exist in the Simulink Model?

There is no information about it in help documentation.

Please help me.

[Monika Jaskolka]

I don't have an answer, but I am also interested in the answer. I am using R2019a and there still does not seem to be a way to programmatically find annotation connectors. Using the below command does not pick them up:

find_system(gcs, 'FindAll', 'on', 'Type', 'annotation')