I want to change the checkbox icons in ionic

Question

I want to use my own icon for the ionic checkbox (ion-checkbox). I manage to do it in the console by changing the class of a div that I don't have in my html sheet..

My code :

` <ion-col col-4  class="left ">
      <ion-item class="noBorder modFilter" >
        <ion-label></ion-label>
        <ion-checkbox (click)="launchSearch()"[(ngModel)]="housing">
        </ion-checkbox>`  

The code in the console :

  ` <ion-checkbox class="checkbox checkbox-ios ng-untouched ng- 
   pristine 
       ng-valid" ng-reflect-model="false">
  <div class="checkbox-icon">
  <div class="checkbox-inner"></div> 
  </div>`

If i change div class="checkbox-inner" by div class="my-custom-icon" in the console, it's good but i don't know how can i do that, because i don't see this div..

Help me please, if you have any idea ..