Attaching a bone chain to two points in a BP

I’m trying to add a simple two-point chain to my game. I managed to attach the starting point to an object, and making it simulate physics from there. What I need now is to find a way to attach the ending point (same skeleton) to another object, so I can have an “arc” (the second point is going to move around).

I’m trying to do this with a very simple object with 4 bones. The goal is to have bones 1 and 4 attached to objects that can move around, and 2 and 3 simulated.

Can anyone give me a light here?

Thanks

Update: I managed to make this work using the Transform Bone node instead of physics simulation.