Whirlpool UNDERCOUNTER DISHWASHER STAINLESS STEEL TUB Installation Instructions Manual page 12

Using two or more people, grasp sides of dishwasher door frame
and place dishwasher on its back.
Remove and discard the plastic rail cover on each side of the
dishwasher frame. To remove the plastic rail cover, push upward
and back to unsnap it from the dishwasher frame.
Using a flat-blade screwdriver, turn the plastic fasteners ¼ turn
counterclockwise to unlock them. Remove panel. Do not remove
tech sheet from access panel.
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Using a " hex head socket, nut driver or Torx
remove terminal box cover. Retain for later use.
Install a UL Listed/CSA Approved strain relief. Make sure screw
heads are facing to the left when tightening conduit nut. Strain
relief is provided with the power supply cord kit.
NOTE: If using Option B, proceed to "Determine Cabinet
Opening," to continue with the installation of your dishwasher.
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T20 screwdriver,