Multiple Russound Cav6.6 Configuration

Hey so I have 3 Russound Cav6.6’s using RNET to link them all together. I have a USB -> R232 cable connected to my PI and im able to control one out of three of them using the Russound RNET using ser2net. This is what my config looks like right now.

#Russounds @ dev/TTYUSB0
media_player:
  - platform: russound_rnet
    host: 127.0.1.1
    port: 4001
    name: Russound
    zones:
      1:
        name: Front Entry
      2:
        name: Main Hall 1
      3:
        name: Main Hall 2
      4:
        name: Main Hall 3
      5:
        name: Mecha Hall 1
      6:
        name: Mecha Hall 2
    sources:
      - name: Church Sound

But i’m unable to get at the other 2 Cavs because I’m not sure how to configure them. Does anyone have any tips on how to access the other two. I tried to add a number 7 to the zones with no luck. Not sure what to do next.