I didn't number my diagram because I was running out of space, but on my drawing it would be numbered from top to bottom,
1 to 3 on the front section and 4 thru 6 on the rear section
the original Dynaco drawing is numbered the same, except that the loudness taps are numbered 4 and 8,
which changes the numbering of the volume control rear section to 5 thru 7 instead of 4 thru 6.
So, on my diagram he balance control top front #1 and bottom rear #6 are ground,
and volume control bottom front #3 and bottom rear #6 are grounded.
Balance #2 goes to volume #1, and balance #5 goes to volume #4.
All balance and volume controls are wired like this.
One end is ground, center is output (wiper), and other end is input.
If I had a PAS3 here I could take a photo for you, it's very very simple.
OH . . now looking at your photo, I see your ALPS pot is actually labeled 1-2-3 in the reverse order of my drawing.
On the ALPS, pins 1 and 4 are ground, the inputs are on pins 3 and 6.
I've got some old photos of ALPS volume/balance pots here: http://tubes4hifi.com/SP8-AM3.htm