Eclipse and Shade entered the building through the back gate.
Seeing Rocket enter the third room on the first floor, Eclipse devised a similar plan to enter the second floor through the windows.
The structure of the second floor was completely different from that of the first floor. It had only one room with a single door for entrance. The 'Sweet Peppers' gang generally used that floor for meetings and to store some expensive items.
That room didn't even have any balconies. There were only windows for ventilation.
After the guards at the windows were eliminated, no one else dared to take that position again.
They thought it would be suicidal to stand there. Instead, they decided to confront the enemies through the stairs.
Eclipse explained his idea to Shade, and he agreed to the plan.
They both went to opposite corners and climbed the building using the pipes and the cavities in the wall.