Copy any or all of them, depending on what you want to do.

Alter the contents of the file(s) as you wish("battleroyal" was my mod's name, it would be the name of your mod).

You can find out more things to put in the config by doing this command while in "usermaps" custom MP lobby:
After doing the command, check this file. Remove the word "gametypesettings" from the ones you want to copy.

Go in the game and load it from the mods menu.
It will work in game without needing to be published as long as it is in the right folder and compiled(linked).