How to open individual prefab doors

Hello, in my game I’m trying to make it so that the player can move the crosshair over an object (in this case a footlocker), have the crosshair change color and on the press of a button have it open or close. I made the footlocker a prefab so I have a lot of them in the scene. How do I make it so that I only open the footlocker the player is looking at? Here is my code so far.

using UnityEngine;
using System.Collections;

public class ActionButtonScript : MonoBehaviour 
{
	int i = 0;
	public float playerReach = 5.0f;

	void Update () 
	{
		CrossHairScript crossHairScript = GetComponent<CrossHairScript>();
		ChestOpenerScript chestOpenerScript = GetComponent<ChestOpenerScript>();
		RaycastHit target = new RaycastHit();
		Vector3 fwd = transform.TransformDirection(Vector3.forward); 
	
		Debug.DrawRay(transform.position, fwd,Color.red);
		if (Physics.Raycast(transform.position, fwd, out target, playerReach))
		{	
			if(target.collider.gameObject.tag == "Openable Door")
			{
				crossHairScript.x = 1; //Changes color of crosshair;
			    if(Input.GetKeyDown(KeyCode.E)) 
				{
				// opens the footlocker player is aiming at
				}
			}
			else
			{
				crossHairScript.x = 0; //Reverts crosshair to default;
			}
		}   		
	}
}

Thank you in advance

I just implemented a door today. I’d recommend doing something like having a box collider on each door (is Trigger). When the player enters the box collider trigger, set a boolean “isBesideDoor” = true and when the player leaves the trigger, set that boolean to false. Then when the user presses KeyCode.E, only open the door if isBesideDoor == true;

This way, the door will only open if the player is beside it. There are a handful of other ways to implement this but this is one easy way.