Correct. The speaker output from the hu will need to just be blocked off. If it still has the factory connector, just unhook it. If it's bare wire, cut the wire and either tape up the end or put something like a crimp on it to make sure it doesn't connect to anything. And attach the wires to something in the door so they aren't just bouncing around in there as you might hear it. Duct tape works well in that situation. Electrical tape adhesive will wear off from the heat in the summer and become loose.