how to configure new network card on hyper-v

dear all 

i need help in my problem 

first i have hyper-v with one network Adapter and every thing working good.

now i attached new USB Modem on hyper-v host and when i install that usb modem i found new network Adapter and every thing working good till now 

now i have 2 network  Adapter on hyper-v host

and when i go to Virtual network manager to add that new network Adapter i don't found it ..

 who to add that new Adapter on  Virtual network manager