Pretty simple, there’s a fuse in the fuse box under the dash labeled DCM, just remove it. It’s extremely simple and takes 3 minutes. The DCM has an 18650 backup battery so it’ll stay powered for a short time but should die in a day or two and stop transmitting.
Haven’t had the time to tear the dash apart. It’s located below the infotainment screen. It’s not transmitting so no need for immediate action.