According to Garcia y Garcia, this area was nearly all destroyed by the bombing in 1943.
The bomb provoked the total fall of the walls, internal and external onto Via Consolare (VI.4.8), between the north wall and on its east side.
See Garcia y Garcia, L., 2006. Danni di guerra a Pompei. Rome: L’Erma di Bretschneider. (p.75)
Now, it would appear to be a rear entrance to VI.4.8 and VI.4.9, but according to Fiorelli, it was a stairs to an upper independent dwelling.
See Pappalardo, U., 2001. La Descrizione di Pompei per Giuseppe Fiorelli (1875). Napoli: Massa Editore. (p.53)
VI.4.9 Pompeii. May 2003. North wall. Photo courtesy of Nicolas Monteix.
VI.4.9 Pompeii. May 2003. Detail from the north wall.
Photo courtesy of Nicolas Monteix.