Hi,
have the same question, tried it no result.
It's also against the reference instruction "In the case of a subdomain, enter only the main domain. So if your subdomain would be
http://name.yourdomain.com, enter only yourdomain.com".
Have a normal and a mobile site. The mobile site is on subdomain "m.".
The structure of both is the same. Only thing I see is: as example "index.php", no clue if this is from the mobile site or the main site. Tried the rename string and rename site part, no result. The Domain names are not visible.