UMG Textblock to Variable

Hey !, …well i need Help to do Communicate Between a BP and a HUD

I have a Wood SIGN BP that Calls a SignField Widget to the Screen.

I want at the SignField ,an editable Text through Blueprints(Via Text Variable), how im gonna do it? i was googling it… saw Something but nothing worked for me.

Hope SOmeone can Help me

Thanks!