Help with assigning

Unity Engine
1 
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;


public class IncreaseDecrease : MonoBehaviour {

        public Text text;
        public Button btnDecrease; // added reference to buttons so can disable them
        public Button btnIncrease;

        public int max = 50000;
        public int min = 10000;

        int currentAmount = 0;
        int increasePerClick = 10000;

        // from button click event, call AdjustValue(true) if want to increase or AdjustValue(false) to decrease
        public void AdjustValue(bool increase)
        {
            // clamp current value between min-max
            currentAmount = Mathf.Clamp(currentAmount + (increase ? increasePerClick : -increasePerClick), min, max);
            text.text = currentAmount.ToString();

            // disable buttons if cannot increase/decrease
            btnDecrease.interactable = currentAmount > min;
            btnIncrease.interactable = currentAmount < max;
        }
    }

I got this code from someone who had a solution to my problem, but I don’t know how to directly assign buttons to this code because it won’t let me drag and drop the buttons where there supposed to be and I don’t know how to assign the buttons from the code so could someone help me.

2

I got a solution to my problem, so this thread is no longer needed.