Does this plugin support CPT connections ?

Hello,

I follow the documentation to create post to users connetion but for CPT the connection box doesn’t appear in the admin pannel. Do I miss something ?

Here is my code :

function my_connection_types() {
	p2p_register_connection_type( array(
	    'name' => 'ecole',
	    'from' => 'post',
	    'to' => 'user'
	) );
}
add_action( 'p2p_init', 'my_connection_types' );

I also try the user -> post but same problem.

https://wordpress.org/plugins/posts-to-posts/