Speaker in cab of HO Goose?

Does anyone have any experience installing a speaker inside the cab of an HO Concor goose?

I would like to try putting a speaker in the cab and the box of a goose. Any suggestions?

Thanks!

I’ve installed a sound decoder and speaker in the box of a Con-Cor HO scale Galloping Goose, but I doubt that one could be put into the cab, even the smallest speaker available – not to mention the problem of getting it apart to put a speaker into it, and running wires to it from the decoder.

The sound from the tiny speaker that has to be used in the Con-Cor Goose is very winpy and a second speaker would be helpful, but I doubt that it is possible.