I used:
// Add Hyperlinks to Attributes in Additional Information Tab on Product Page
add_filter ('woocommerce_attribute', 'rb_link_attributes', 10, 3);
function rb_link_attributes($attributes_string, $attribute, $terms) {
global $post;
$taxonomy = get_taxonomy( $attribute['name'] );
if ( $taxonomy && ! is_wp_error( $taxonomy ) ) {
$attribute_string = '';
$terms = wp_get_post_terms( $post->ID, $taxonomy->name );
if ( !empty( $terms ) ) {
foreach ( $terms as $term ) {
if (strlen($attribute_string) > 0) {
$attribute_string .= ', ';
}
$archive_link = get_term_link( $term->slug, $attribute['name'] );
$attribute_string .= '<a href="' . $archive_link . '">'. $term->name . '</a>';
}
}
}
return '<p>'.$attribute_string.'</p>';
}