Identifying Neutral/Active when wiring a caged SMPS
Since you will be using an earthed mains plug, and as you have polarized mains plugs in AU, I would connect it like it says on the label. However, as most power supplies like computers supplies only have one fuse, and they are used in countries where you can connect mains plug in either orientation, so the live and neutral are not guaranteed to be in certain way, it makes little difference which way you connect it, as the input should be symmetrical otherwise.