With the camera set to "multiple exposure" it will not wind the film. That takes you halfway where you want to be.
Next thing would be to advance the film manually after each shot.

I don't know whether you can use the manual wind on the film back to move on to the next frame. There probably isn't a stop, so watching the frame counter advance would be the way to tell that the film is in position for the next frame. But will it work?

Can't you run a test film through the thing? Or even an 'empty' backing paper?