How do i make a script that drags a hinge joint object

i am trying to make a ragdoll game and i need to make this code drag a hinge joint ragdoll using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class Drag : MonoBehaviour
 {
 
     Rigidbody rb;
 
     void Start()
     {
 
         rb = GetComponent<Rigidbody>();
     }
 
     private void OnMouseDrag()
     {
         Vector3 mousePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, -Camera.main.transform.position.z + transform.position.z);
 
         Vector3 objPosition = Camera.main.ScreenToWorldPoint(mousePosition);
 
         transform.position = objPosition;
 
         rb.isKinematic = true;
 
     }
 
     private void OnMouseUp()
     {
         rb.isKinematic = false;
     }
 
 
 }

this is the ragdoll in the library

[1]: /storage/temp/192159-screenshot-357.png

i am new to unity and would appreciate any help that you can provide, thank you