smart snap help

So i just download smart snap for Gmod, and i need to know, do i put in in the addons folder or the gmod directory.

(gmod directory as in Steam\steamapps\gamingcow\garrysmod \garrysmod)

Addons.

gmod directory as in Steam\steamapps\gamingcow\garrysmod\garrysmod\addons[smartsnap folder with an info.txt in it]

Just to be precise.