My dishwasher was inop from when I bought it. The PO said he did not use it nor knew if it worked. 
I found that the garbage disposal knockout was still in place so the dishwasher had not been used since the new disposal was installed. This was the same mistake I made the first time I replaced a garbage disposal in one of my houses.
I bought a Fisher Paykel Single Drawer Dishwasher DD24S19 N. I did not need a separate install kit.
Installation of the drawer cover was easy-peasy. Getting it sq