With all questions, yours being a good example, it is better to give explicit detail to help us help you. So, I can only guess at what you are trying to achieve.
Assuming that 'land' means LAN:
Normally, your MB1 need only be linked to your router which is on the same LAN. This is by ethernet cable or WIFI. With DHCP enabled in your router, the MB1 is assigned its own IP address. Without DHCP, you would need to assign the IP address manually and on the same subnet. So if your router has an IP address of 192.168.1.1, then you could give the MB1 an address of 192.168.1.x where x is between 2 and 255. The subnet mask would be 255.255.255.0
If though, you really have two different networks, not on the same subnet, then the Bridge is valid. The scenario is shown here:
To create it, go to Windows Network Connections in Control Panel. Select the two connections that you want to Bridge. From the right-click menu, select Bridge and it will be created. You can then assign it an IP address of its own or allow it to be assigned one dynamically.