Retainer

In this case the dishwasher had already been installed for a few years. After removing it, we inspected it and saw it needed a bit of TLC. The transport wheels on the back were missing, making it harder to move around without scratching the tile and some of the original hardware was rusted or broken off. I looked up the parts easily here on PartsSelect using their parts breakdown diagrams and was glad to see what I needed was still available. We had a licensed plumber relocate the hot water line and drain for us to make things a bit easier.
A licensed electrician had also moved the power line over to the new location and left a wire sticking out of the bottom of the wall to hardwire the dishwasher in again. We decided to convert the dishwasher to be able to be plugged into a standard 20amp wall outlet instead. We had already purchased a kit with a nice long cord and strain-relief snap on plastic fitting that snapped onto the metal incoming power box on the bottom front of the dishwasher. Using the supplied wire nuts, etc., we connected the wires and ground wire to the proper wires from the dishwasher and ground lug. We put the dishwasher aside and then went to work on converting the power wire coming out of the bottom of the wall, to a conventional outlet. I am mentioning all this because in our first attempt we unfortunately put the receptacle a bit high off the floor and the new power cord plug end, stuck out and hit the back of the dishwasher so it would not go all the way in and was sticking out from under the counter top. I tried using one of those flat adapter cables, but even that still stuck out to far. So we ended up relocating the outlet box as low as we could on the wall and this allowed the plug to stick out into the opening area at the bottom rear area of the dishwasher so it could now be slid all the way in under the kitchen counter properly. I hope that bit of trial and error will save you some time if you ever decide to go the pluggable route too.
The new installation required the use of the dishwasher side mount brackets, so we had to purchase a replacement set of those, complete with the hardware to screw them down.

This project took a bit longer than planned due to the power plug problem, one which we will remember for any other similar appliance relocation projects, as well as the time to get our new parts in that we had to order, but other than that the rest went smoothly and the dishwasher was relocated successfully.