property binding continue button on menu

I’m trying to do what is described in the property binding section with my own continue button…

i get to the last sentence and i just dont know how to proceed.

“With this variable bound to the IsEnabled Behavior, you could then set this whenever your game is started by checking if a save file is present and if so, Casting to this Widget Blueprint to access and set the DoesSaveExist variable to True which would then enable the Button.”

do you do this in the function get_ContinueButton_bIsEnabled_0 ? or in the MainMenu level blueprint? what actor gets plugged into the casting node?

here is what i tried…