I broke the connector on the bluetooth board when trying to remove the antenna when I tried to replace the hard drive. Currently, the exact replacement bluetooth board 607-6509A is very hard to find or otherwise, expensive. Instead, I was able to use a cheap replacement that can be found on eBay: Apple Macbook Unibody A1342 Airport Bluetooth Module 607-6771A. There is a black plastic sheath at the back of the 607-6771A. Just cut out the part that cover the 2 holes, you are good to go.

I broke the connector on the bluetooth board when trying to remove the antenna (Step 10) when I tried to replace the hard drive. Currently, the exact replacement bluetooth board 607-6509A is very hard to find or otherwise, expensive. Instead, I was able to use a cheap replacement that can be found on eBay: Apple Macbook Unibody A1342 Airport Bluetooth Module 607-6771A. There is a black plastic sheath at the back of the 607-6771A. Just cut out the part that cover the 2 holes, you are good to go.