@Freakjsh no, you have to host a dedicated server and set up a mod menu on that.
-> https://forum.plutonium.pw/topic/13/plutot6-server-set-up-guide
-> https://forum.plutonium.pw/topic/10/tutorial-loading-custom-gsc-scripts
-> https://forum.plutonium.pw/category/23/bo2-modding-releases-resources
Also don't try to inject anything into the game process, it will get you banned (except you're in lan mode).