Add your Wordpress files into this folder and they will be used instead of the default Wordpress original source.

Configure Wordpress to inform it is running behind a proxy server and using HTTPS. Add to your wp-config.php the following lines:

define('FORCE_SSL_ADMIN', true);

if (strpos($_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') !== false)
       $_SERVER['HTTPS']='on';

For more information visit http://codex.wordpress.org/Administration_Over_SSL#Using_a_Reverse_Proxy.