[Samba] migrate from win2012srv to samba 4.1.17-Sernet-Debian-9.wheezy

[Sam]

  Hello,

I'm trying to join a debian/samba4 to a win 2012 srv with this scripts : 
https://secure.bazuin.nl/scripts/this_is_the_old_set_of_scripts/
( the join method is available only on "this_is_the_old_set_of_scripts")
I'm facing different problems with the dns (bind9)

My question is :
in 2-setup-sernet-samba4-ADDC-wheezy-JOIN-DC.sh script, What value 
should I put for SETIPDC1 under BIND9/DNS related settings? Is it the 
windows 2012 server ip or the new samba4 ip?
I'm asking this because in this script, we can read :
## the ip of DC1 should match the hostname above. ( which is set by 
default at
## hostname in single word, but you dont need to change this
SETHOSTNAME=`hostname -s`)
and we can read more down :
## Put here the IP of the first DC you installed.
SETIPDC1=
SETIPDC2=

Just a bit strange, so I would like to be sure for put these value 
correctly...

Thanks! :)