How to move an object left and right in unity using trackhat opentrack headtracker ?

Hello!! Currently I have developed a game called 2d space shooter and in that there is an energy shield which should be controlled with the track hat head tracker using "FaceTrackNoIR App". I have already integrated the dll file in unity and I have this code:

In this code I want the logic to be changed to controlling the shield using head tracker (only with the yaw movements). Can someone tell how to do it please? As of now, I am using vertical axes control in FixedUpdate method.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using System.Runtime.InteropServices;
 using System;
 
 public class ShieldControl : MonoBehaviour
 {
 
     public float shieldspeed;
     private Transform shield;
     public float speed;
     public float maxBound, minBound;
  
     [StructLayout(LayoutKind.Sequential)]
     public struct FreeTrackData
     {
         public int dataid;
         public int camwidth, camheight;
         public Single Yaw, Pitch, Roll, X, Y, Z;
         public Single RawYaw, RawPitch, RawRoll;
         public Single RawX, RawY, RawZ;
         public Single x1, y1, x2, y2, x3, y3, x4, y4;
     }
 
     [DllImport("FreeTrackClient64")]
     public static extern bool FTGetData(ref FreeTrackData data);
 
     public float Yaw = 0F;
     public float Pitch = 0F;
     public float Roll = 0F;
     public float X = 0F;
     public float Y = 0F;
     public float Z = 0F;
 
     public float RawYaw = 0F;
     public float RawPitch = 0F;
     public float RawRoll = 0F;
     public float RawX = 0F;
     public float RawY = 0F;
     public float RawZ = 0F;
 
     public float x1 = 0F;
     public float y1 = 0F;
     public float x2 = 0F;
     public float y2 = 0F;
     public float x3 = 0F;
     public float y3 = 0F;
     public float x4 = 0F;
     public float y4 = 0F;
 
     private ShieldControl.FreeTrackData trackData;
     private static float direction;
 
     // Start is called before the first frame update
     void Start()
     {
         shield = GetComponent<Transform>();
         trackData = new ShieldControl.FreeTrackData();
     }
 
 
     void FixedUpdate()
     {
         float h = Input.GetAxis("Vertical");
 
         if (shield.position.x < minBound && h < 0)
             h = 0;
         else if (shield.position.x > maxBound && h > 0)
             h = 0;
 
         shield.position += Vector3.right * h * speed;
 
 
     }
 
 
     // Update is called once per frame
     void Update()
     {
         if (!ShieldControl.FTGetData(ref trackData))
         {
             Debug.Log("FTGetData returned false. FreeTrack likely not working.");
             return;
         }
         ShieldControl.FTGetData(ref trackData);
 
         Yaw = trackData.Yaw;
         Pitch = trackData.Pitch;
         Roll = trackData.Roll;
         X = trackData.X;
         Y = trackData.Y;
         Z = trackData.Z;
 
         RawYaw = trackData.RawYaw;
         RawPitch = trackData.RawPitch;
         RawRoll = trackData.RawRoll;
 
         RawX = trackData.RawX;
         RawY = trackData.RawY;
         RawZ = trackData.RawZ;
 
         x1 = trackData.x1;
         y1 = trackData.y1;
         x2 = trackData.x2;
         y2 = trackData.y2;
         x3 = trackData.x3;
         y3 = trackData.y3;
         x4 = trackData.x4;
         y4 = trackData.y4;
 
 
     }
 
 }