Add following snippet to NK Sliding Panel content field of tab. After that sliding panel's buttons will appear above Contact Form and Subscription form of the Ninja Kick Series.

<script>
jQuery(function($){
   setTimeout(function(){
        var $tabs = $('.nks_cc_trigger_tabs');
        $tabs.append($tabs.find('.ncf-tab-icon, .nksub-tab-icon'));
   },0)
})
</script>