Recently I installed a Cycle Country plow on a 1984 Honda Big Red 200ES. I bought this plow as a package deal with the BIG RED. This plow mounts to the footpegs and frame. It is manually raised and lowered using a hand lever on the left side of the three wheeler. Cycle country was a company that offered snowplows back when BIG REDS were new. Here is some pictures and captions for more details.
Here is the plow all mounted up.
Here are the pictures of the mounts that was given. These are homemade and they mount to the footpegs. It seems like this plow was not specifically made for the 200ES and the previous owner took a cycle country plow and made it work.
Pictures of mounts installed on footpegs. Note the rear foot brake pedal cannot be used with the plow installed. No big deal here since you can operate the rear brake with the hand lever.
Picture of the plow that is cut so it will clear the fender.