The first NIC should show up as ETH00 and the second will show up as ETH01. You will also notice that you will have a VPN99.
ETH00 is your internal interface
ETH01 is what you would connect to the Internet
VPN99 is your virtual adapter for VPN connectivity
I have had problems in the past with NIC not being recognized. In particular ISA cards. So if you are seeing ETH01 I am not sure why you aren’t seeing ETH00.
Double check in the NETWORK tab.