[DukeBruno123]

Afaik sm_cvar is only needed if you want to set values for convars that are hidden or to extend the limit of a convar. (Eg the limit for a convar is 0 to 1 but you want to force it to 3 then you use sm_cvar).

Put them inside your "gamemode_<gamemode>_server.cfg" because some might reset due to the gamemode config getting executed.

Might be a bit wrong here. I barely ever use sm_cvar.