Open either the 32bit or 64bit folder and then copy the Panther folder to your respective 32 or 64 bit ISO's Sources\$OEM$\$$ folder as it is.

So for example for 64 bit OS: Open the 64Bit folder and copy the Panther folder to the Sources\$OEM$\$$ folder in your ISO file.

Likewise open the 32Bit folder copy Panther etc...

This will auto-turn off Encrypting drives during setup.
Also allow no internet connection to bypass setting up a online account.

This is for x64 (64 bit only) you can change the amd64 to x86 if you wish.