Use the Thunderstore link to install!
Currently there are two options within supplementary_mines.cfg
Consistent Landmines, true or false, "Every map will have mines in their spawn table."
Landmines Multiplier, any number, "Multiplies the default amount of mines to spawn."
Landmines Minimum, any number, "[Only applies with Consistent Landmines turned on] The minimum amount of mines to spawn."