You may note that the biscuit box retrenchment wall is missing in these photos, as is the mealie redoubt. This is because these features were added during the action and so they will not be there at the start of the game.
This section of the barricade was not manned during the fight as it formed an exposed salient in the line. Rather, the men lined the 'dog-leg' barricade to take attackers in enfilade if they tried the porch. Note that any Zulus who make it onto the porch are pretty safe!