1. There is a fold-able piece that covers the Wireless LAN connector. You just need to carefully fold it up enough to remove the connector with the spudger tool.
2. Pulling the logic board out is tricky and isn't as easy as some instructional videos make it. It is a snug fit. Don't force it, take your time with it, and be patient. A trick is to try one side at a time.
3. There is a power plug cover that isn't seen on some of the instructional videos.
4. If you bought the OWC kit, don't follow the book, follow their video guide instead.
http://www.youtube.com/watch?v=jSA65MjfRG8
5. Be gentle with the power plug when you twist it and don't pull on it to get the Power Supply out. Also, during re-assembly, make sure the power plug is properly sitting upright or when you re-insert the logic board, the plug won't line up with the board very well.
6. The SATA cable that came with the OWC is a little long (just by a few mm), and after seating both hard drives, it will seem that the OWC SATA cable over shoots the port. It might be tricky to fit it on snug without bending too much.
7. Just be patient with it and don't over force anything. Take your time with the process.
The point is that the fan cable has to be pulled upward and not back, regardless of the tool. Using the spudger just seems easier since it is more precise than a finger. You can get a better grip from the bottom with the tool.
I know pulling up on the cable seems weird, but that is just how the plug is designed. Watch the videos carefully.