rd web access 2012 public computer / private computer radio button

In 2008 R2 you could modify the login.aspx page and change the default radio button selection on this page so that the "this is a private computer" option was selected by default.  (see this thread: http://social.technet.microsoft.com/Forums/windowsserver/en-US/320d979f-9067-4dcd-9424-ab65a7bf6486/this-is-a-private-computer?forum=winserverTS)

now its seems this does not work.

I have changed the code on login.aspx to reflect my wish to make the "Private" option radio buttonthe default selected one by adding checked="checked" to the proper Input section and removing it from the other, but it does nothing (and I restarted the website too):

                    <label><input id="rdoPblc" type="radio" name="MachineType" value="public" class="rdo" onclick="onClickSecurity()" /></label>
...

...

                   <label><input id="rdoPrvt" type="radio" name="MachineType" value="private" class="rdo" onclick="onClickSecurity()"checked="checked" /></label>
                 

I have also looked through the renderscripts.jsp file but I dont't see an option to make the default checkbox change.

So where is this option located now?

Thanks!