How to swap 2 game objects from any position on a 2d game pad?

Hi everyone. I am trying to change my script from swapping 2 gameobjects next to each other to swapping 2 gameobjects from any location.

I have a grid in my 2d match 3 game and I would like to swap any two gameobjects regardless of their location on the grid.

Here is my script in c#:

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using Berry.Utils;
 
 // "Switch" Booster
 // This object must be in the UI-panel of the booster. During activation (OnEnable) it turn a special mode of interaction with chips
 public class BoosterSwitch : IBoosterLogic {
 
     public Animation hand;
 
 
     // Coroutine of special control mode
     public override IEnumerator Logic ()
     {
         hand.gameObject.SetActive(false);
         yield return StartCoroutine (Utils.WaitFor (SessionAssistant.main.CanIWait, 0.1f));
 
         Chip chipA = null; 
         Chip chipB = null;
         Side side = Side.Null;
 
         System.Action<Chip, Side> fu = (Chip c, Side s) => {
             if (c.slot && c.slot[s]) {
                 chipA = c;
                 chipB = c.slot[s].chip;
                 //location = l;
                 side = s;
             }
         };
         
         ControlAssistant.swap = fu;
         
         while (chipA == null || chipB == null)
             yield return 0;
         
         ProfileAssistant.main.local_profile["hand"]--;
         ControlAssistant.swap = Chip.Swap;
 
 
     
         Vector3 rotation = new Vector3();
         switch (side) {
 
         case Side.Null:
             
             case Side.Bottom:
                 rotation.z = 0;
                 break;
             case Side.Left:
                 rotation.z = -90;
                 break;
             case Side.Top:
                 rotation.z = 180;
                 break;
                case Side.Right:
                  rotation.z = 90;
                    break;
             }
 
         hand.gameObject.SetActive(true);
         hand.transform.position = chipA.slot.transform.position;
         hand.transform.eulerAngles = rotation;
         hand.Play();
 
         yield return new WaitForSeconds(0.5f);
 
         SessionAssistant.main.SwapByPlayer(chipA, chipB, true);
         SessionAssistant.main.swapEvent--;
         SessionAssistant.main.movesCount ++;        
 
         while (hand.isPlaying)
             yield return 0;
         
         hand.gameObject.SetActive(false);
         UIAssistant.main.ShowPage("Field");
     }
 
     public override void Disable() {
         ControlAssistant.swap = Chip.Swap;
     }
 }
 

Any help would be great. Thanks