Custom context menu for data cursor (MATLAB GUI)

I have a specific context menu in the GUI file.

Once datacursormode is on, I would like to retain that context menu.

Google gave the following code to 'remove' the context menu in the datacursor mode (working)

h = datacursormode(gcf);

set(get(get(h,'UIContextMenu'),'Children'),'Visible','off')

How do I add a Context menu which was pre-defined in the GUI ?

[derboo]

Have you already an answer how to customize the datacursor context menu? I'm try to customize it, too - but no success.