It's a definite "maybe".
But there is more than enough evidence to establish that the pilots were briefed for a track direct from Cape Hallett to McMurdo Station. Apart from the script used for the audio commentary, note that the pilots then went on to the simulator. The did the pre-flight checks, including the manual entry of the waypoints. The instructor then positioned the simulator at 60 degrees south to practice the change to grid navigation, and then positioned the simulator over McMurdo Station to practice the cloud-break procedure. How did the instructor do that? By using the nav track that had been previously entered into the simulator. So what track must have been entered? One that went to McMurdo Station.