Creating a vector between 2 objects in ICE?

[Sam]

As the subject says, I'm trying to create a vector between 2 objects in ICE?
Essentially what I want to do is point a null (which is attached to the
closest location on the surface of a mesh) at another object. I've tried
several ways, and I just can't seem to get it to work. It seems that no
matter what I do, the vector is always coming from the origin (0,0,0). I
thought this would be easy, but I'm obviously doing something very wrong.