2D rope problem

Hello, first sorry for my English which is very bad, I google translation translation.

I have a problem, I create a game similar to Angry Birds.
I want to create between the pillars a rope connecting the object to be propelled.

To better understand because my English is none here here images.


I want a result like the image below (Here I used a Draw Debug)


In blueprint how to do?

thank you

Up please.