Sniper Scope zooms in, but I don't know how to display the crosshair

Hello Community.

Recently I started working on a FPS assassination video game. I created a scope that works with a secondary camera at the front of my scope, which targets a plane and renders with a render texture.

This issue I am facing, is I am having trouble overlaying a texture of the scope's crosshair (the + in a sniper's scope). I want it to display over the render texture, while still being as accurate as it can be. Please help, as I am stuck with this issue and can't continue my project until the current issue is fixed.

The code I am using for my scope to go into the ADS mode , is as follows..

 #pragma strict
 var defaultFOV : int = 0;
 var fovSpeed : int = 0;
 var fovIn : int = 0;
 
 var gunAim : boolean = false;
 var playerCam : GameObject;
 
 var gunModel : GameObject;
 var scopeInAnim : String;
 var scopeOutAnim : String;
 
 function Start () {
     defaultFOV = playerCam.camera.fieldOfView;
 }
 
 function Update () {
     if(Input.GetMouseButtonDown(1)){
         animation.Play(scopeInAnim);
         gunAim = true;
     }
     if(Input.GetMouseButtonUp(1)){
         animation.Play(scopeOutAnim);
         gunAim = false;
     }
     
     if(gunAim){
         playerCam.camera.fieldOfView = Mathf.Lerp(playerCam.camera.fieldOfView, fovIn, fovSpeed * Time.deltaTime);
     }
     
     if(!gunAim){
         playerCam.camera.fieldOfView = Mathf.Lerp(playerCam.camera.fieldOfView, defaultFOV, fovSpeed * Time.deltaTime);
     }
 }

It's a javascipt code, btw.

Please help, thanks in regards. -RuSchoeman