The MN port is only for the old black foam top remote. Of which, killing programs should be used no more than 3-4 days because after that any bugs that didn't die become stronger.
That's why when the new black clam shell remotes were made, they are only used on the BN port.
From Q&A on Spooky2: The Remote 2.0 you have is the BN polarity. Using the MN electrical polarity with the BN magnetic polarity doesn't make any sense.
The Remote 2.0 you have worked for Healing and Killing - All from the BN output Port of the Boost. It should never be connected to the MN output.
The MN port was used for the previous version Remotes where the magnetic polarity was reversed on one - and showed to have negative consequences when used more than 3 or 4 days (or shorter for some sensitive individuals. This magnetic polarity is no longer supported by Spooky2, except to say it is best to not use it.
For more details, please check the link: