I have two VMs in my VirtualBox. Both are FreeBSD and should communicate between each other. I have created network with DHCP enabled and set like this:

Server Address  10.10.10.1
Server Mask 255.255.255.0
Lower Address Bound 10.10.10.100
Upper Address Bound 10.10.10.200

My VMs are pinging each other and getting right ip adress. This is what I must have and can´t change.

Now I want to access internet from one VM and I found that I must use two network cards but I don´t know how to set the second one. I am new with VirtualBox and this stuff so if you count with this in you answer I would appreciate that. And I have Windows 8 as host system if it´s matter.