It should also be noted that this will not be actually inhabited by the resident astronauts - it contains a heap of sensors to monitor retention of pressure and

It should also be noted that this will not be actually inhabited by the resident astronauts - it contains a heap of sensors to monitor retention of pressure and atmosphere etc, and astronauts will enter it a handful of times (wikipedia suggested around 30-40 times during its mission last time I looked) - so it's just laying the groundwork for a potential further attachment in the future