Mines packed away or else I'd grab photos. I attached the motor on the bottom of the coffin. I have a skeleton arm attached to a piece of black painted PVC pipe, which is hooked to the motor. The hand of the arm pushes up on the lid, with the hand side of the PVC pipe in a larger diameter coupler attached to the lid.
I can build a static prop very well but I kind of such at motors. How do I wire up a wiper motor and hook it up to make a seesaw go up and down? My plan is to make a haunted playground addition to my graveyard this year.