They left the middle district feeling great and confident about what they were going to do. Instead of leaving the middle district that same Friday, they travelled the next day, to avoid the urge of going home when they reach the upper district.
It didn't take long before they entered the upper district. They didn't want to draw too much attention to themselves and walking would do just that, they instead rented a car under a fake name.
According to the texts his grandfather left behind, there were only two entrances to the underground ring. One was directly through the Blakeson building, another was kilometers away from town. Deep underground.
There were old sewage drains that connected to the underground ring, and they decided that was the best option for them. They couldn't just walk in through the front door, it'd be too daring and reckless.