Extract the folder "realistichandcuffs" and "tbfy_shared_v2" to your addons folder
Spawn and use the "Setup SWEP" from the (Q)Sandboxmenu->Weapons->ToBadForYou->Setup Swep
[b]The Setup SWEP is also used to configure the config (some are still setup with the sh_rhandcuffs_config.lua inside the lua/tbfy_rhandcuffs folder)[/b]