The aux_logits are created a bit deeper in the model (line of code 11), so that it would just make sense to use them, if your fine tuning goes further down the model (below self.Mixed_6e(x)). Maybe I misunderstood your first post, but I thought you just wanted to re-create the last linear layer.
If you want to fine tune the whole model of just beyond the aux output, you could of course re-use the aux_logits. I’m not sure if that’s the usual approach, but definitely worth a try!
In that case you would also have to re-create the final linear layer in InceptionAux 11.