Changing Spline with Niagara during Runtime

I have a 2-point spline with a Niagara particle system that spawns particles along it. The system spawns particles along the original 2 points of the spline, but do not spawn between points added during runtime. I am guessing that this is because the system does not automatically update the spline. I found a set Niagara Variable node, but it only works for actors, not spline components. Is there a function to set the Particle System’s spline to a component?