Controlling launch via slider (UI)

I have two walls and my character is programmed to bounce from them. It’s been done with Launch Character in Room blueprint. (basically room with these two walls). I created a widget with slider. I want to change launch character (vector) parameters via this slider. How can I do this? (I tried to use lerp with event dispatchers, but according to troubleshooting results, my code somehow doesn’t reach node. I appreciate any help