Perform the following steps to connect your the IoT Box manually with the Odoo instance:

1. Open the IoT menu.
2. Click on the Connect button on the control panel. This will show the following popup. Copy the Token:

3. Open the IP of the IoT Box with port 8069. This will display the home page of the IoT Box. Click on the Configure button in the name section:

4. Set the IoT Box name and paste the server token. Then click on the Connect button. This will start configuring the IoT Box. Wait for the process to be completed:

5. Check the IoT menu in your Odoo instance. You will find a new IoT Box: