drupal alter node edit form

How can I add a custom configuration area to a node edit form just beneath the Authoring Information & Publishing Options section?

The follow code generates the last menu in the attached image:

    $form['barclays_epdq'] = array(
        '#type' => 'fieldset',
        '#access' => TRUE,
        '#title' => 'Barclays ePDQ',
        '#collapsible' => TRUE,
        '#collapsed' => TRUE,
        '#group' => 'additional_settings',
        '#weight' => 100,
        'barclays_epdq_active' => array(
            '#type' => 'checkbox',
            '#title' => 'Enable this webform to send users to your Barclays ePDQ store to make a payment',
            '#default_value' => $active_state,
        ),
    );

ps: the form is in hook_form_alter