If the EUT power supply does not have PE but has an FG terminal, where should the FG terminal be wired?

If the EUT power supply does not have PE but has an FG terminal, where should the FG terminal be wired?

Follow the reference standard, but if there are no specifications, conduct normal mode testing without connection.
However, considering the actual installation situation, it is preferable to also conduct common mode testing by connecting to the PE of the CDN output.