Get the component from which a ContextMenu is opened

I created a button in App Designer to export some information. If i click the button the export will be xlsx; if a right-click the button a context menu is opened to export in different formart or to export a template.

I would like to know from which button the context menu is opened because from that button I can understand which value must be exported.

I see that event.Source.Parent refers to the overall figure and not the button.

Is it possible to achieve this with or without link programmatically the context menu to the button?

[Adam Danz]

Could you share the code where you're assigning the context menu to the buttons?