Help Replace pin constraint in runtime?

[Karlanton]

I have a rope and at both ends there is a pin constraint to two different objects. After a 'event' i would like one of the pin constraints to be attached to a new object. How do i do this? i tried copying the code from the Grappling hook scene by doing this:

https://gyazo.com/df0ab0ef81ea4b37b709bb44f62ba535

Thanks in advance for any help!