Do the following if you wish to permanently change its default location.
1. open comments.php in your theme folder
2. locate the exact spot where you would like the buttons to show
3. insert the following code: <?php do_action('comment_form_top', $post->ID); ?>
4. open ui.php in the social-connect plugin folder
5. find add_action( 'comment_form and replace with add_action( 'comment_form_top