first we need to modify two scripts, one for the backend, other for the frontend, lets start with the backend

1-)inside /wp-content/plugins/woocommerce-openpos/includes/admin/Admin.php, stock_products() function:

2-We need to modify the view, for the page wp-admin/admin.php?page=op-stock, so the needed file is /www/wwwroot/nadaalazhar.com/wp-content/plugins/woocommerce-openpos/templates/admin/stock.php

That is it :), the end result as following:

in order to search file system, you might use