It consists of removing the existing pins, replacing the 2 rows of 4 pins with 2 rows of 7 pins. Remove the 5th pin on both rows and solder the 2 rows in with the extra pins to the left.
Next solder fine wire from these extra pins to pins 9,10,12,13.
The extra pins are GPIO14, GPIO12, GPIO13 and GPIO15.
You can now plug this into a 14 pin IDC socket or any other of your choosing.
See the attached photo.
I accept no responsibility for your lack of skill if you screw the board