For the guide,
If renaming D9WIP into arm9.bin, then we have to replace SafeA9LHInstaller's arm9.bin with it later.
If renaming D9WIP into arm9loaderhax.bin, then we have to replace Luma's arm9loaderhax.bin with it later.
If SafeHax can boot a third filename, then we can rename D9WIP into it, to make all three files exist on the same SD/MicroSD card, to make the "one card batch exploiting multiple 3DSes" more convenient.
(edit)
If supporting booting a 3rd filename is OK, could it have a highest priority, to avoid booting arm9.bin & arm9loaderhax.bin earlier?
For the guide, If renaming D9WIP into arm9.bin, then we have to replace SafeA9LHInstaller's arm9.bin with it later. If renaming D9WIP into arm9loaderhax.bin, then we have to replace Luma's arm9loaderhax.bin with it later.
If SafeHax can boot a third filename, then we can rename D9WIP into it, to make all three files exist on the same SD/MicroSD card, to make the "one card batch exploiting multiple 3DSes" more convenient.
(edit) If supporting booting a 3rd filename is OK, could it have a highest priority, to avoid booting arm9.bin & arm9loaderhax.bin earlier?