The cover art's from this article in ARMOR magazine:
https://www.benning.army.mil/Armor/e...ber1994web.pdf
The actual East German plan was code named Operation CENTER. The only Soviet force involved was to be the 6th Guards Motor-Rifle Brigade in East Berlin, all other forces were East German: 1st MRD from Potsdam, a battalion from the 40th Air Assault Regiment, the nine Frontier Guards Regiments that manned the Berlin Wall, two "People's Police Alert Units" and four battalions of East German Worker's Militia from Potsdam.
They expected to take the city in three days. More likely, a week. And the attack was to start before the Pact crossed the border into West Germany proper.
And the Stasi had very detailed plans for the administration of West Berlin after it fell.....including lists of those to be arrested (those were destroyed prior to reunification, but they are known to have existed).
Check the article out: it's pretty good.