Syslinux - Sep 2019 - Docs on PXELINUX and UEFI - What config file?

When looking at
https://wiki.syslinux.org/wiki/index.php?title=PXELINUX it doesn't
tell you want configuration file the UEFI version is looking for?  Is
it looking for syslinux.cfg, default, or something else?

I'm presuming syslinux.cfg in the same directory the files are in.
and I just use the same config file using:
INCLUDE ::pxelinux.cfg/default

??