I have read of some Eriba owners fitting a mover to a Puck 120, however as suggested its the weight and the very low ground clearance that will be a problem. Factor in approximately 25kg for the battery and 35kg for the mover. Try contacting Automotive Leisure or Jandi for advise..
We had the same issue, with our 1993 puck, as small as the Puck is when it is on a slight incline or in soft gravel it's like trying move a stubborn baby elephant, we changed ours out for a Familia so that we could have a bit more room and the fitting of a mover would be more straight forward..