TSN Evaluation Kits

Hei

We bought three TSN Evaluation Kits and we are supposed to be building a TSN network using all the three of them. We have formed a network and can access the 192.168.1.1 successfully. The problem comes in trying to connect the three kits together. How can this be achieved. Do we change the default MAC  addresses of all the three kits and use the MAC addresses in connecting the kits. We are stuck in this phase and any help will be appreciated. Thanks and hope for some answers