Dishwasher Drain Line Back Up
	
	
		Hello. My dad recently installed a new garbage disposal. Shortly after running my dishwasher, water started shooting out of the stop gap. I was able to discover the problem - they had forgotten to remove a plug in the garbage dispoal - and I was able to fix it by disconnecting the black hose and removing the plug. My dishwasher is now able to drain. My question and concern is I wonder if there was any damage or leaking under my dishwasher. I am unable to remove or pull it out to see. Does anybody know how the drainline out of the dishwasher is connected? Is there a chance that the backup from the disposal plug caused water to push back in the drainline back into the dishwasher causing leaks under the dishwasher? Or is the drainline connected inside the dishwasher? I am so afraid of any water damage. Many thanks for any help!