Top rack wasn't getting clean

This couldn't have been easier. After unsnapping the docking station from the dishwasher, I aligned the two flapper valves that come with the unit and pressed them into place. I then pushed the new unit into place by pushing first on the left side and then the right until it clicked into place.
I looked at the old one and found that one flapper was gone and the gaskets were deteriorated. What made the whole process easier was buying from PartSelect. I have bought from them before and will again.