Initial_filter for pupup

@p.konetskiy how to place this line code:

'displayParams' => 
    array (
      'initial_filter' => '&<field_relate>_name_advanced="+this.form.{$fields.<field_relate>.name}.value+"',
);

I want to test on my end, don`t know if it is applicable to my concern https://community.suitecrm.com/t/relate-field-auto-populate-related-result-on-other-field/86748.