In the answer to question Localization of symmetric monoidal categoryLocalization of symmetric monoidal category, it was mentioned that '' Assuming that the tensor product of two morphisms in $S$ is again in $S$, the localised category should inherit a symmetric monoidal structure, just by the universal property.''
So I want to know by which universal property we can show that $\mathcal{M}[S^{-1}]$ inherit a symmetric monoidal structure?
Since I cannot comment on the original answer, I posted this as a new (stupid) question.