Summary: The Red Led next to the solenoid is lit whenever the solenoid is energized. Two pairs of wires attached to the solenoid board come from the switches described in the next pictures. The paddle engaging the sponge is the damping paddle. The black nylon clamps must be perpendicular to the starting bar. The starting bar, absent any rubber bands, should rotate up and down
Image Dimensions: 640 x 480
Image originally found here.