OcclusionArea.center  

// Sets the center of the occlusion area to the center of the transform

@script RequireComponent(OcclusionArea)

transform.GetComponent(OcclusionArea).center = Vector3.zero;

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(OcclusionArea))]
public class example : MonoBehaviour {
    void Example() {
        transform.GetComponent<OcclusionArea>().center = Vector3.zero;
    }
}

import UnityEngine
import System.Collections

[RequireComponent(OcclusionArea)]
class example(MonoBehaviour):

    def Example():
        transform.GetComponent[of OcclusionArea]().center = Vector3.zero