So heres some instructions because OP didnt provide any:
Go to this folder
%AppData%\Local\Plutonium\storage\t6\scripts
Make a new folder called zm
Then put the two gsc files in there.
Then start a custom lobby and type set bo2_zm_bots_count x (replace x with how many bots you want)
Then start the game and the bots will connect a few seconds in game. They dont connect in the lobby.
There. So much confusion could have been avoided if you just took the time to write a few sentences.