Replacing OverlapSphere with colliders (Detecting weapon collision with enemies - SOLVED)

So i basically have this really basic combat system that i made off Brackeys' tutorials...but now i want it to be more complex and involve colliders instead of Physics.OverlapSphere(). So i just need to ask how do i create a replacement for this single line of code

 Collider[] hitEnemies = Physics.OverlapSphere(attackpoint.position, attackradius, enemies);

but this time using colliders. just to clarify, I intend to make a combat system where the weapon has two colliders -- One on the Main Attacking part and another on other parts which will deal significantly less damage. So i have divided the mesh into two parts giving them separate colliders.

It would be great if you could just help out with the first issue though i think i can figure the multiple colliders out myself. Big Thanks in Advance.

Here is my messy combat script for reference

link text

EDIT: I managed to get a few things done that i think should've worked. I have updated my player combat script. However, things seem to be not working too well...instead of interacting with the enemies...the weapon is pushing them around. I want the weapon to phase through the enemy collider.

the scripts attached to my weapons are

This is the WeaponCollider script to manage the different collisions

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class WeaponCollider : MonoBehaviour
 {
    public Collider maincollider;
    public Collider secondarycollider;
    public PlayerCombat playercombat;
 
    public bool maincollides;
    public bool secondarycollides;
 
    void Update()
    {
      if(!maincollides && !secondarycollides)
      {
        playercombat.hitEnemies.Clear();
      }
    }
 }
 

The script attached to my main collider (the one that deals more damage) is

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class MainCollision : MonoBehaviour
 {
     public WeaponCollider collidermanager;
     public bool checking;
     public Collider enemytocheck;
     public bool result;
 
     void OnTriggerEnter(Collider collider)
     {
       collidermanager.maincollides = false;
       if(collider.gameObject.layer == LayerMask.GetMask("enemy"))
       {
         collidermanager.playercombat.hitEnemies.Add(collider);
       }
     }
 
     void OnTriggerStay(Collider collider)
     {
       if(checking)
       {
         if(enemytocheck == collider)
         {
           result = true;
           ReturnCheck();
         }
         else
         {
           result = false;
           ReturnCheck();
         }
       }
     }
 
     void OnTriggerExit(Collider collider)
     {
       collidermanager.maincollides = false;
     }
 
     public void CheckEnemy(Collider enemy)
     {
       checking = true;
       enemytocheck = enemy;
     }
 
     public bool ReturnCheck()
     {
       return (result);
     }
 }
 

The script attached to my secondary collider is

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class SecondaryCollision : MonoBehaviour
 {
   public WeaponCollider collidermanager;
 
   void OnTriggerEnter(Collider collider)
   {
     collidermanager.secondarycollides = false;
     if(collider.gameObject.layer == LayerMask.GetMask("enemy"))
     {
       collidermanager.playercombat.hitEnemies.Add(collider);
     }
   }
 
   void OnTriggerExit(Collider collider)
   {
     collidermanager.secondarycollides = false;
   }
 }
 

The maxdamage and mindamage variables in the combat script are the damage values for the main and secondary collider respectively. Please Help!!