What object do I cast in the cast function?

I have read many posts and guides but i don’t understand the solution of my problem:

my project is a flyngpawn jump in random level when overlap a triggerbox.
when go to another level pass a string to hud text. (var: question choised)
I use a blueprint class/ TriggerBox for this function.

my problem is when i cast this blueprint in hud section, which is the Object?

thanks for who will answer me

It’s interesting question for me

If you “open level” wont the unload the trigger box?

You could always have a variable in the HUD called “question choised” that you cast to and set right before you open level