Save/Load Serialization by @Cherno

So i've been using the save/load serialization system of sir @Cherno . But the thing is i can't figure it out how can i use it properly with my quest . Here's what it looks like.

So in this image i made my TestObject1,TestObject2,TestObject3 as a prefab.

And this image i dropped the TestObject2 to the white plane and setactive it to false and it will count a score and then saved it and when i exit and load my game the testobject 1 and 3 would not disappear anymore. Could someone please point out what i am doing wrong .

In my white plane here is my code:

 public GameObject q1;
 public GameObject q2;
 public GameObject q3;

 public GameObject count;

 void Start(){

 }

 void OnCollisionEnter(Collision col){
     
     if(col.gameObject.CompareTag("Try1")){
         q1.gameObject.SetActive (false);
         count.GetComponent<AddIntegers>().counter++;
     }
     else if(col.gameObject.CompareTag("Try2")){
         q2.gameObject.SetActive(false);
         count.GetComponent<AddIntegers> ().counter++;
     }
     else if(col.gameObject.CompareTag("Try3")){
         q3.gameObject.SetActive (false);
         count.GetComponent<AddIntegers> ().counter++;
     }
 }