1. ordered the part (kit), shipping was very fast, got it next day even though had not paid for next day shipping.
2. found a video on YouTube that showed how to replace that part (suggestion: it would be nice if you would send a link to such a video with the order.) The video was less than 2 minutes and was VERY HELPFUL!
3. removed the old upper spray arm with pliers to unscrew the center nut (didn't have socket set so used pliers instead).
4. replaced with the new part.
the entire process was fairly simple.