The PCS-31 is a "stereo insert cable."
It is a "Y" cable with one end terminating in a single 1/4" STEREO (Tip, Ring, Sleeve) plug and the two other ends terminating in two 1/4" MONO plugs.
It is a "Y" cable with one end terminating in a single 1/4" STEREO (Tip, Ring, Sleeve) plug and the two other ends terminating in two 1/4" MONO plugs.