Lay down a tarp to protect the floor and tip the dishwasher on its back. Remove the cover panel at the bottom of the unit. Wrap Teflon around the water inlet's threads. Screw a brass elbow onto the inlet. Tighten it with an adjustable wrench.
Stand the dishwasher up and push it up to the bay. Check that the water and electrical lines are properly aligned. Feed the end of the drain line from the dishwasher through the side of the cabinet and up via the unused floor hole. Then have a helper guide the drain line as you slowly slide the dishwasher in place