Assign Input Spline Path to Generator at Runtime?

[TenaciousLibbs]

Hi there,

I am attempting to instantiate a Curvy Generator at runtime and assign an existing Spline in the scene as the Input Spline Path.  I'm having tremendous trouble  making this happen.  Once the Generator is instantiated from a prefab, it's child object "Input Spline Path" asks me to create or assign a spline.  This is where I get stuck.  I can't figure out how to do this, and I've tried everything!  Please advise.  I've attached a screenshot as well.  

Thanks so much!

Michael