A:Answer If you're having the appliance delivered by Best Buy, they'll make you purchase the power cord and connector hoses. Sounds like an upsell, but all it really means is that the installation includes attaching the power cable to the unit, and the hoses to the wall, and making sure the thing works as it's supposed to. So, basically, a long way of saying, if you bought the delivery/installation service, they're going to make sure it's the right type of cabling and hoses. To make sure, you may want to take a picture of the wall/fixtures where the unit will be installed, so that they can see exactly the types of connectors, outlets, etc... that you have, so that they have the right connectors in stock.