The speaker is in the main unit, useless when mounted remotely in the back, under the deck. In the 2018, I installed an external speaker in the smaller of the two chambers in the center console, and left the lid open all the time. I suppose the head could go on top, but that is pretty awful IMO. I spent some time thumbing through the service manual on-line, and I think it is possible for it to be mounted in place of the charging pads. That seems a reasonable sacrifice, I will never use them anyway.