HOTween: How to access different "layered" properties in a single tween?

i can't seem to find a way to create a single tween that handles multiple properties when they are not in the same child, i have this case where i want to move the object position AND change a custom value not accessible by gameObject.transform, i thought i could simply type something like "transform.position" in the field and pass the object itself instead of its transform field.

way hints?