Unfortunately, It’s a customization issue that is not included in the support.
Just a general idea, You need to customize header.php file, you will find the following HTML
<div class="tools">
<ul>
<li class="menu"><a href="javascript:void(0);" title="<?php _e('Menu','Samsara');?>"><?php _e('Menu','Samsara');?></a></li>
<?php if(!isset($SSR_VAN['hide_search']) || $SSR_VAN['hide_search']<>0):?>
<li class="search"><a href="javascript:void(0);" title="<?php _e('Search','Samsara');?>"><?php _e('Search','Samsara');?></a></li>
<?php endif;?>
<?php if(is_plugin_active('woocommerce/woocommerce.php')):?>
<li class="cart"><a href="javascript:void(0);" title="<?php _e('Cart','Samsara');?>"><?php _e('Cart','Samsara');?></a></li>
<li class="account"><a href="<?php echo home_url();?>/?page_id=<?php echo get_option('woocommerce_myaccount_page_id');?>" title="<?php _e('Account','Samsara');?>"><?php _e('Account','Samsara');?></a></li>
</ul>
</div>
You need to add new Li tag inside UL, for example
<li class="twitter"><a href="http://yourtwitterprofile" title="Follow me on twitter">Twitter</a></li>
Then you need to add some your custom CSS for .twitter{} class.
Thanks