add media to the short description and description

Hi, Dear Dokan team i need a help, I want to add media to the short description and description. I found a code but don’t know where to put this code. Could you please tell me. Code below.

Thank you.

add_filter('dokan_product_short_description', 'add_media_button');
add_filter('dokan_product_description', 'add_media_button');

function add_media_button(){
  return array(
    'media_buttons' => true
  );
}