While I appreciate your thoughtfullness, I am inclined to (Unmark) my reply as the (Correct Answer), it at the least may have been helpful . For in actuality your concern has not been addressed as of yet. Hopefully moving your thread to a more appropiate area will precipitate that.
you can change the values easily under Configuration -> [Selected Proxy] -> User Interface.
I would suggest to enable HTTP and HTTPS connection first. If something fails, you are always be able to use the Web UI.
I have never changed this, BECAUSE, you need Port 443 for SSL traffic and at the moment i have no info if the WEB UI can be bound to a specific network interface. If this is not possible, you cannot change the value to 443.
From my point of information i would NOT change the central management port to 443.