I'm sorry, but I think you need to start from the very beginning here and describe exactly what sequence of events you want to happen. To be frank, I'm trying to find a way to explain that what I've already shared with you a few times is exactly what you want. There are only so much time I can spend repeating it.
Is the following a fair description of what you'd want to happen?
- a user drags on an instance of your node to their workspace
- they double click it to open its edit dialog
- within the edit dialog the user is shown some information that has been retrieved from the REST api
- the user makes some selection and closes the dialog
- the user deploys the node and their flow does whatever its configured to do
