To be able to access the bundle in-game:
• Press the Xbox button on your controller, then scroll down and select My games & apps from the guide.
You can also access this section from your console dashboard's Home menu.
To the right, you will see a grid with all the Installed games and apps.
• Toggle to Ready to install.
• Choose the Rainbow Six: Siege tile.
• Select Choose what to install.
• Highlight the Safari Bundle and press A.