How to add variables to the “redirect to url” or the “show more url”?

// Use this to change the "redirect to url" parameter
add_filter( 'asp_redirect_url', 'asp_add_params_to_url', 1, 10 );
// Use this to change the "show more results url" parameter
add_filter( 'asp_show_more_url', 'asp_add_params_to_url', 1, 10 );
function asp_add_params_to_url( $url ) {
  // Array of param names and values
  $values = array(
    "param1" => "value1",
    "param2" => "value2",
    "param3" => "value3"