Reduce _kerberos SRV prioirty

I would like to reduce the priority for my _ldap and _kerberos SRV records on my AD-DNS.  The lower priority is desired for just 2 of our domain controllers.  I've found in the registry where the change can be made for _ldap, but I'm not sure what entry to create for _kerberos.  I'm using the following document as a reference.

http://technet.microsoft.com/en-us/library/cc781155.aspx