twentysixteen social links on header

Hello,

How can the social links be put on the header as in rao.co.ke? i thought they should be appear automatically when you add the social link menu items.

i thought the code on the header should place them automatically

<?php if ( has_nav_menu( 'primary' ) || has_nav_menu( 'social' ) ) : ?>
					<button id="menu-toggle" class="menu-toggle"><?php _e( 'Menu', 'twentysixteen' ); ?></button>

					<div id="site-header-menu" class="site-header-menu">
						<?php if ( has_nav_menu( 'primary' ) ) : ?>
							<nav id="site-navigation" class="main-navigation" role="navigation" aria-label="<?php _e( 'Primary Menu', 'twentysixteen' ); ?>">
								<?php
									wp_nav_menu( array(
										'theme_location' => 'primary',
										'menu_class'     => 'primary-menu',
									 ) );
								?>
							</nav><!-- .main-navigation -->
						<?php endif; ?>

For footer they appear when i add some custom links to the social links menu. I thought the same should apply for the header?

Rgds,