DIY op-amp power supply
I am hoping to use 9V batteries, and realize I might have to run two or more in series?


This is how to make bipolar power supply using two batteries.



And for reverse engineering the board - check to which connector terminals goes pin4 and pin8 of the IC. Then connect batteries correspondingly +Vs to Vcc+, -Vs to Vcc- and GND to GND.



Image taken from Datasheet.