[Zombies] Trouble adding score display for matches with 4+ players

[zagoraichu]

Hi, I'm kinda new with the BO2 modding stuff, and I was trying to add the second score display to my dedicated server, but I'm not sure where to put the code that our friends have developed.
The post with it is this one:
https://forum.plutonium.pw/topic/2424/release-zombies-secondary-score-display-for-matches-with-4-players

I am using the "ZombiesSimpleMod" and a few others to fix the announcer sound and the
Origins map with 4+ players, but when I tried to insert it together on the code it simply won't load.

Oh, and when I say "where" I mean which file or folders.

I'm sorry if this is a silly question, but this is the only post I found about this.

Anyway, thank you !