How to make actor follow this non timeline based spline from a relative position

Hello,

I have a timeline based Spline and I could put 1 instance of the Spline in the level and many AI actors spawned everywhere. The AI actors used the Spline from their own spot and follow it.

Now I found this tutorial that does not use a timeline but I could not make my actor use it from its relative position. Is it because of the Ref Point used in it?

Any idea how to alternate the blueprint?