Apologies for the terrible artwork, but here's what I think is going on on the daughterboard:
Pins are numbered 1-12, anticlockwise from top right, like a regular IC.
I'd guess, therefore:
5 - input from capsule
4 - noninverting amp dc blocking capacitor
6 - circuit ground
3,8 - to output coupling caps
7 - mid supply decoupling capacitor
9 - main supply decoupling capacitor
10 - battery input?
1,12 - from output coupling caps
2,11 - to XLR
By
I didn't have any luck by reinstalling the '2134. The board(s) drew a lot of current and the phantom supply voltage at the XLR connection dropped to a very low value.
I see what you mean about the 10Ks. I'll revise my order...
Thanks so much for the help!