2-demethylmenaquinol-10 + S-adenosyl-L-methionine => menaquinol-10 + S-adenosyl-L-homocysteine + H(+)
2-demethylmenaquinol-10 + s-adenosyl-l-methionine => menaquinol-10 + s-adenosyl-l-homocysteine + h(+)