Ok I just finished the pot and I belive it's now wired the way you described. I also build it inside a box so it wouldn't break that easily.
From the right side comes the input (audio panel) and out the left side goes the output (camera). The red wire is right-side audio in the stereo cable and the yellow is the ground.
Would it be possible for me to wire the left-side audio cable (white) to the right-side audio on the output side? That way the camera would record in stereo (it would still be from a mono source of course) and I wouldn't have to fix it in editing.
I also got the pick-up and I'll be testing both during a long flight tomorrow. I'll post the results for others to reference.