Setting-up NAT adapter in cloud-config not working

Archive RancherOS
1

Set-up: Windows 10 Pro and VirtualBox.

Situation: I try to set-up a NAT adapter and a Host-Only adapter through the cloud-config.yml file.

rancher:

   network:
      dns:
         nameservers:
         - 1.1.1.1
         - 1.0.0.1
      interfaces:
         eth0:
            address: 10.0.2.15/24
               dhcp: false
                  gateway: 10.0.2.1
                     mtu: 1500
         eth1:
            address: 192.168.56.60/24
            dhcp: false
            gateway: 192.168.56.1
            mtu: 1500
         lo:
             address: 127.0.0.1/8

Result: The host-only works, the NAT doesn’t. When I run ifconfig, I see both interfaces configured with the IPs that I provide.