Wasn't a fix. Needed to add a second HDD to my Mini.
It was very smooth, considering. Everything in the tutorial was straight forward. Where I got slowed down was self induced. I was very nervous about disconnecting the different cables. Not knowing if a cable was supposed to pull straight out or up, I had to be sure.
You could change (enhance) the tutorial regarding the IR and fan cables. The IR in particular is pulled from wire end so the end of the connector is the last part of the cable to leave the board.