why did you skip audioL?
It only has 4 wires on it, but it is a 5 pin connector and so the wires are skewed one spot to the left, relative to the orientation you just posted. So:
Brown = gnd
Red = video
Orange = audiol
white = audior (this is the one that is cut off near the connector)
This seems most clear in the first picture at his post:
Need your advice guys - Page 2
As you can see, the pigtail plug has four wires and the 5th location (bottom) has no wire/pin installed, but the VTX input is still there. So, on your pigtail connector you have no 5v wire at all, the next up is gnd (brown), video (red), audiol (orange), and audior (cut off white).