Can't figure out how to code equipment slots

I'm trying to make the item icon in my equipment slots show up when an item is equipped, and I can't find a way to reference the other scripts in my EquipSlot script. I tried maybe referencing it as an instance in the Equipment script, but it gave me an error. EquipSlot Script:

using UnityEngine; using UnityEngine.UI;

public class EquipSlot : MonoBehaviour {

 EquipmentSlot equipSlot; //Slot to store equipment in

 public Image icon;
 public Button removeButton;

 Equipment equipment;

 Item item;
 InventorySlot invSlot;

 public bool isEquipped;

 public void EquipItem(Item newItem, Equipment Equip)
 {
     item = newItem;

         icon.sprite = item.icon;
         icon.enabled = true;
         removeButton.interactable = true;
 }

 public void ClearSlot()
 {
     item = null;

     icon.sprite = null;
     icon.enabled = false;
     removeButton.interactable = false;

 }

 public void OnRemoveButton()
 {
     //Remove from equipment slot
 }

}

Equipment scripts:

using System.Collections; using System.Collections.Generic; using UnityEngine;

[CreateAssetMenu(fileName = "New Equipment", menuName = "Inventory/Equipment")] public class Equipment : Item {

 public EquipmentSlot equipSlot; //Slot to store equipment in
 public SkinnedMeshRenderer mesh;

 public int armorModifier; // Increase/decrease in armor
 public int damageModifier; //Increase/decrease in damage

 public override void Use()
 {
     base.Use();
     EquipmentManager.instance.Equip(this);
     RemoveFromInventory();
 }

 public void Equip()
 {
     EquipmentManager.instance.Equip(this); // Equip it
     RemoveFromInventory(); // Remove from inventory
 }

}

public enum EquipmentSlot { Head, Body, Face, Back, Waist, Hands, Weapon, Leg, Foot }