Got me. Nobody seems to have that info. I have often wondered why the upper part of the bellhousing has that squarish hump...but I have no idea. Maybe someone else will chime in?
Potentially it could be for other cars. Th 240 went into a lot of Euro models. I'd be willing to bet that a cruise cancel switch or a starter inhibit switch could occupy that location. Next time I'm under the car I'll see if it's connected to anything, or just a blind plug.