Below are the modification instructions and associated pictures.
1) Unsolder gray 12 pin ribbon cable from main board.
2) Remove 22 ohm resistor
3) Remove 100 ohm resistor
4) Remove 68nf capacitor
5) Install two jumpers as shown
6) Solder Flash Cap + wire to hole #2
7) Solder Flash Cap - wire to hole #12
8) Solder Battery + wire to hole # 7
9) Install Battery - wire into hole #11 and solder to pad at hole #12 (there is no solder pad at hole #11)
10) Solder trigger + wire to hole #4
11) Solder trigger - wire to hole # 10