Litespeed plugin setting with shared Litespeed Entreprise Web Server

Could you help me with Litespeed plugin
setting on a Litespeed Entreprise Web Server from shared hosting) + Keycdn

After setting Litespeed plugin following instruction form hosting, website speed went down...

Do you have a guide of how to set litespeed plugin (LSWS from shared hosting does not allow me to set something else)?
I my case I have Keycdn, but the question is not about the can part of litespeed and more about litespeed plugin on LSWS)