How to use a AzureVM MABS to make a data backup for a AVS vm?

Question

Hello, i got a special network with my environment as follows：

AzureVM   
   MABS01.test.local   IP: 10.0.1.1
   Domain01.test.local  IP:10.0.1.5（domain controller and the DNS Server）
AVS
   test01.test.local      NIC1:10.0.2.1 metric:10 (production Network)
                          NIC2:10.0.3.1 meteric:100 (Backup Network)

The production network and the backup network is conneted with the 10.0.1.0/24 by the routing.

I want the Backup data be transfer on the Backup Network but not the production NetWork, what should i do?