[molecular_function] demethylmenaquinone methyltransferase activity <sep> S-adenosylmethionine:2-demethylmenaquinol methyltransferase activity <sep> S-adenosylmethionine:2-demethylmenaquinol-7 methyltransferase activity <sep> S-adenosylmethionine:2-demethylquinol-8 methyltransferase activity