I found an old USB wifi adaptor laying about the office and noticed that it is well supported in BT. I also had an old RPSMA pigtail laying around and decided to marry to the two.
This where it started going wrong :-(
Here a picture of the board:
I removed the internal antenna from the board but in doing so I also damaged the board (marked A). The ground was connected to point B.
I was wondering if anyone can point out another place on the board where I can solder the pigtail.