[Vet]

The CVars can be placed in any config that gets read upon server startup or mapchange depending on how you want to activate them. Personally, I place then in either my server.cfg or amxx.cfg. The plugin will default to 'on' and to display the zoom amount. So unless you want to change those settings, there's no real need to enter the CVars into any config.

As for the mwheel, running the command will replace the original binds with zoom binds. To return to what you had, you'll have to manually rebind the keys. I use the mwheel to change weapons too. So mine are bound to 'invnext' and invprev'.