Next, the replay knocker and the shaker on LedWiz were connected. The knocker knocks very loud when you win a free game. It's connected via an extra switching relay, because it draws about 3 amps at 24 volts, which is too much for the LedWiz to drive. The shaker is a greater vibration motor which starts as a mechanical feedback during certain actions in some tables. The LedWiz controls here a Dual-H-Bridge, which provides the necessary power. The vibration strenght is adjustable from "off" to "very much" - also controlled by the pinball tables.
In the last picture you can see the intermediate result. Since it was too confusing with all the wiring, I installed a few old cable channels on the sides.