∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  {S₁ S₂ : CategoryTheory.ShortComplex Cᵒᵖ} (φ : S₁ ⟶ S₂), (CategoryTheory.ShortComplex.unopMap φ).τ₂ = φ.τ₂.unop