Nginx Proxy

Hello.

I have 2 servers with nginx intalled with 2 external ip.( 192.168.0.1 192.168.1.1)
1 domain - example.com
3 web services test1.example.com test2.example.com test3.examle.com

and BIG problem :)

Right now i have DNS setup:
test1.example.com - 192.168.0.1
test2.example.com - 192.168.0.1
test3.example.com - 192.168.0.1

I need to change DNS setup to:
test1.example.com - 192.168.1.1
test2.example.com - 192.168.1.1
test3.example.com - 192.168.1.1

But web services must remain on 192.168.0.1

How to configure that setup?

Thanks for any help :)