Mark's docks don't have a tuner connector, no.

You could fashion one, but I think you would need extra pins to insert into the docking connector, I don't think he populates all the pins in his dock. You would also need the molex connector for the other end.

Assuming you could source the pins, I don't think the project would involve pain and swearing, just patience and care.

I have an ML dock (unmodified), and also a home-made dock with the tuner connector dangling out the back for the tuner module. So I know it can work that way even though I haven't done it to Mark's dock.