MAMEWorld Forums - EmuChat - Can't make the cfg's to work right

I was reading the mame docs but couldn't find anything, the best I could find was the chapter about multi configuration files but nothing on cfg's.
https://docs.mamedev.org/advanced/multiconfig.html

Lets say I want to apply some settings to all neogeo games, this one was generated from kof99:
https://pastebin.com/reyvavmm

I've set this way to get a black screen so I know it's working. If I save this as neogeo.cfg, delete kog99.cfg and change the "system name" from "kof99" to "neogeo" or "default", mame doesn't read the my settings although mame show messages saying it is reading neogeo.cfg when it doesn't?

Code:

Attempting to parse: neogeo.cfg
Attempting to parse: default.cfg
Attempting to parse: kof99.cfg

Does this cfg files have to be saved/moved to a directory named source/neogeo.cfg or something similar like ini files?

Is there an option like cfgfile that we can use inside an ini file so mame can read the cfg the user want?