Bosch 300 Series Installation Instructions Manual page 18

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Reposition the hoses such that they run through the strap on the other
side.
Be sure to snap the strap back in place to secure the hoses as shown.
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the dishwasher into the cabinet. Use hands on both sides of dishwasher
to push evenly.
Pull water inlet and drain hoses through the hole in cabinet as shown.
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