Rebel groups say they plan to target the air force intelligence headquarters, among the most feared authorities in Syria's extensive security apparatus. Many of the Aleppo-based rebels claim to have spent time in the building's solitary cells and torture rooms.
"We are saving the tank shells we have for when we get access to the Air Force intelligence headquarters," said Mohammed Karim, from the rebel-held town of Azaz. "We will free the prisoners first, then destroy the building."
Other fighters said getting a foothold in the heart of the city would be difficult. "It could be another three to six months," said Hussein Shmaili, a police captain who defected.
Resting in a house on Aleppo's outer limits, Firas Abu Ayoub said: "The Shabiha are running the checkpoints. They are tough and they are are nasty and they want revenge for Zino Berri."
Berri, allegedly the chief financier and organizer of the Shabiha in Aleppo, was captured with his two sons on Wednesday and savagely gunned down following a brief show trial.
Video footage of the executions taken on mobile phones is being widely shared among rebel groups now advancing on Aleppo. Some rebel commanders are well aware of the damage the executions have done to their cause.
Partly in a bid to rectify the damage, a major from the city of al-Bab, 30 kilometers (about 15 miles) from Aleppo, took the Observer to meet a group of regime prisoners captured in a battle a fortnight ago. All were housed in a classroom on the top floor of a school.
"We were holding them before the Berris were caught," said Major Abu Mohammed al-Asmar. "And they have been treated like kings ever since they got here."
The prisoners, among them three junior Alawite officers and a Shia sergeant, slept on mattresses alongside captured Sunni conscripts. All claimed they would return home if freed.
"I just want a solution," said one of the Alawite officers. "Stability. Who really thinks about sectarianism here? Who doesn't want a state where people's rights are respected?"
None would answer a question about whether the fall of the regime or its continued rule over Syria would make a difference to their lives. And nor would they address a constant refrain among exiled Alawites: that neither rebels nor world leaders could safeguard their futures in the power vacuum that it is likely to follow the end of the regime.
"We don't want guarantees," said a second Alawite officer. "We just need peace."
Later, Major Abu Mohammed said: "We would swap all of these prisoners for just one of our men. The Alawites would return to the army. All of them."
As next week's showdown looms, fighters in the outskirts of Aleppo are continuing to ready for battle. In the early hours of Saturday, 60 members of the al-Bab brigade with bandanas and weapons they had captured from the prisoners now in the schoolhouse left for the front-line.
Aleppo's much-vaunted wealth is on clear display in many well-to-do streets and its commercial districts still appear to be functioning despite the onslaught.
Syrian leader, Bashar al-Assad, said in a statement during the week that the battle for the city would determine the future of Syria.
"That's the first thing he has said that I agree with," said Major Abu Mohammed. "It's also very important for the rest of the Middle East."
Intellpuke: You can read this article by Guardian Middle East Correspondent Martin Chulov, reporting from Aleppo, Syria, in context here: www.guardian.co.uk/world/2012/aug/04/aleppo-syria-civil-war