Where to add links in code

I saw no Register link in my sidebar so checked the code.

<div class="widget-top"></div>
                <div class="widget">
                    <h2 class="widget-title"><?php _e( 'Meta', 'groundfloor' ); ?></h2>
                    <ul>
                        <?php wp_register(); ?>
                        <li><?php wp_loginout(); ?></li>
                        <li><a href="http://wordpress.org/" title="Powered by WordPress.">WordPress</a></li>
                        <?php wp_meta(); ?>
                    </ul>
                </div><!-- .widget -->
                <div class="widget-bottom"></div>
            <?php endif; ?>
        </div><!-- #sidebar-1 -->

Where do I add the code, and what is it, so Register and Log Out are visible?