How to input search terms via a separate form on a content page to a Views Exposed Filter on a different page?
It is possible to use dpm() to understand the form data. In a custom module, you can use hook_form_alter() to act on the exposed filter form.

It would look something like this:

function example_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  if ($form_id == 'views_exposed_form') {
    dpm($form);
  }
}


You can then set the action.

function example_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  if ($form_id == 'views_exposed_form') {
    $form['#action'] = '/path-to-panel';
  }
}


Just beware that this will alter all the exposed filters on the site. You can create a different if statement to target them more specifically if you have more than one.