Choosing Backup host for Backup media server selection

Here is my enviorment 

Mulitple Unix media servers with storage units

3 Backup hosts 2 one datacenter and 1 in the other datacenter

for example the backup hosts are

DC1-backuphost1

DC1-backuphost2

DC2-backuphost1

For DC1 the backup hosts in that DC backs up to media servers in that DC 

In 7.1.x i was restricted to use 1 backup host per policy but in 7.5 i am suposed be able to load balance backup hosts with the "backup media server" but i would like to select DC1-backuphost1 and DC1-backuphost2 for the backup host in this policy also the the backup hosts will write to a storage unit group of the unix media servers.

Is this posible?