∀ (x1 : SSet) (x2 : CategoryTheory.MonoidalCategoryStruct.tensorUnit SSet ⟶ x1),
  ((SSet.hoFunctor.unitHomEquiv x1) x2).toCatHom =
    ((CategoryTheory.Functor.LaxMonoidal.ε SSet.hoFunctor).toFunctor.comp (SSet.hoFunctor.map x2).toFunctor).toCatHom