Which files in the SEP Manager need to be monitored? (PCI)

As per PCI 11.5:

"Deploy file-integrity monitoring software to alert personnel to unauthorized modification of critical system files, configuration files, or content files; and configure the software to perform critical file comparisons at least weekly."

Which files on the SEP Manager are deemed "critical system files, configuration files, or content files" ?

I'm setting up a File Integrity Montioring (FIM) solution, and need to know which files I need to watch for changes, that normally shouldn't be changed on the SEP Manager.

Thanks,

Brian