Upstrem from Fugitives Drift the river narrows with rocks either side, this was the crossing point of the impi. They then jogged North. Directly in front of them would be the rear of the Oskarberg. They moved to their left cutting around the Western slope of the hill. Looking at the reverse situation, from the defenders point of view. Imagine you are standing in front of the hospital defense line, looking at the hill behind the hospital. The impi aproach would have been from your right hand side oblique. The first attack would hve therefore been at the rear Southern corner of the hospital and the Mealie bag and wagon wall connecting the hospital to the store. The main attack would have carried on moving to your right and circled behind you to attack the full face of the defense.
Hope that makes sense?