Clarification Question about migrating_mailboxes and broken doc link

Hi.

I have read the https://doc.dovecot.org/2.3/admin_manual/migrating_mailboxes/#id7 and there is one part which is not 100% clear to me.

We have 2 Dovecot servers mail1 (2.2.36.4) and mail2 ( 2.3.21 ).

Now I have understood that I need to add this to mail1

service doveadm {
    inet_listener {
      port = 12354
    }
}

doveadm_password = supersecret

and this on mail2

doveadm_password = supersecret

The question is for me now: I think that this command doveadm backup -Ru username tcp:host:port should be executed on the mail2.

Is this assumption right?

What I also found is that on that Page https://doc.dovecot.org/2.3/admin_manual/doveadm_mailbox_commands/ the wiki is linked for the manpages but the wiki link shows this.

The old wiki has been closed
Our primary documentation is now at https://doc.dovecot.org, please update your 
links.

What's the right link for the manpages in the web?

Best regards Aleks