leantween ltspline control points setup

Hi, I have a custom curve in unity, made with the simple bezier asset package. from this curve, i attempted to construct a spline, useable with the leantween package. however, it seems the control points in my spline aren't working properly, or i'm doing something wrong. the spline is setup like this: Vector3[] {h0, p0, p1, p2, h2}, as said in the documentation. yet it the object that is meant to follow this spline only goes through te points, and does not follow the curve. are the control points vectors just position, or do i have to adjust them in order to get the curve right? the documentation says i need a tangent in those control points, but that's all it says. can anyone clearify this for me?