Assign a static IP address to the network cards (10.0.0.1 and 10.0.0.2). Then put them in the same subnet (subnetmask 255.255.255.251). That should about do it.
NOTE: This assumes you aren't using a 10.0.0.0 network for your WiFi connections.
For more info (and pretty pictures) go here.
Just so you know, those crazy IP addresses are referred to as self assigned.