if(isset($_REQUEST['cars'])){ // checking which form is coming from post array

    $make = $_POST['make']; // getting the field from the form and pass it to a variable
    $new_post = array( // collecting the information about the new post

        'post_title'    =>   $title,

        'post_content'  =>   $description,

        'tax_input' =>   array('types' => array('cars')),

        'post_status'   =>   'pending',

        'post_type' =>   'vehicles'

        );

      $pid = wp_insert_post($new_post); // pass the array data from above to the function that actually save the post
      wp_set_object_terms($pid, 'cars', 'types', true); // setting the taxonomy for that specific post

      add_post_meta($pid, 'car_make', $make, true); // adding the meta information about the post. THIS IS WHAT I WANT TO APPEAR IN ADMIN EDIT MENU


}