Find the linked sequence and Stop it on Hit

So I have some Target BP in my level. They turn green once they are hit with my line trace setup. I want to have some of those targets moving using the sequencer and I want to be able to immobilize them once they are hit by my line trace. How should I set it up so when the target is hit, it find the attached sequence and stop it?

Here’s my current setup:

Thank you!