Unable to sign a Windows app on macOS/Linux with Electron-builder

Question

I am using Monterey 12.3.1 and following this instructions: https://www.electron.build/tutorials/code-signing-windows-apps-on-unix

I am trying to sign with osslsigncode. I am failing at this step:

11. Install token driver for Mac, export the certificate (convert it to pem when it is .cer)

1. What is actually the token driver? Where to obtain it?

2. I received 2 .cer files from my customer. When I export them from my keychain .pem and .cer is the same content. Is that right?

-----BEGIN CERTIFICATE-----
MIIGzTCCBLWg...etc
-----END CERTIFICATE-----

Also further down:

13. Figure out the key ID by running pkcs11-tool --module /usr/local/lib/libeTPkcs11.dylib -l -O

/usr/local/lib/libeTPkcs11.dylib is missing on my system. Where does it come from? I installed libp11 like stated in the tutorial but this lib is not built. I only have a libpkcs11.dylib but it does not seem to work.

Where I am getting libeTPkcs11.dylib from? Google does not help me here..

I am a total noob in this code signing game. So every help would be appreciated.

Thank you!