Ok. I think that I found a satisfactory way to do this business of getting the connectors to appear in the Icon and Diagram view after instantiating them in the text class. First instantiate the connector(s) in the text view of the class. A quick look at the Icon and Diagram Views shows that there are no corresponding connector symbols in these views. However, if the connector(s) is(are) properly instantiated then it(they) appears(appear) in the component window of the IDE. So then to get corresponding connector symbols in the Icon and Diagram view, switch to the Icon view and then click and drag the connectors from the component window to the Icon palate and place them where desired. After doing this one can see that upon expanding the annotations the corresponding graphic position annotations are placed in the class text. I haven't really found this documented anywhere but I'm still reading the pdf Users Manual from the previous version of SystemModeler so it might be there.
Ok I found where it talks about this method explicitly in the Users Manual from the previous SystemModeler version which a technical support guy kindly emailed to me. This technique is described on pages 83-84 in section 3.5.9. Too bad the new version doesn't have such a document. It would have saved a lot of time.