Maximizer Blake
--> Place the extracted folder on the Mods folder ->Right Here<- , where Plutonium BO2 will recognize it and show as an item you click to load on the game's menu:

Usually any mod folder needs to start with the prefix of the game type its meant to: mp_ for multiplayer, zm_ for zombies. These folder names are recommended to have no symbols, no spaces, nothing special should be on them, and inside all of the mod files need to be directly placed as i show below -->
--> How does a mod folder have to look on the inside for the game to load it correcly?

Taking as example the reimagined mod here, but the bare minimum a mod should have is the mod.ff (scripts) and mod.json (information for plutonium show it on the menu) and usually also the mod.all.sabs (main sound files if the mod uses it) and mod.iwd (textures, images), wile the zmStats or mpStats are saved every time the game saves player stats.