Switches don't have + and - , since when you flick it, it grounds the pins together, creating - or when you flip it off , breaking the circuit.
Di you cut the leg completely off? or is there still some visible metal remaining on the ic? if so solder a wire onto the little bit of the leg that is still visible, solder that wire into Pin 1 of a switch, then solder a wire from pin of the switch into the pad that was connecting the lg to the circuit board originally, but make sure the 2 wires don't touch each other or you will get a short circuit in your wiring which would cause the battery to turn into a normal battery.
Hmm seems a difficult job
There is some metal visibly clear but only a little so the switch would go
[switch]
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1. 2.
Pin 1 goes to the top of the IC Leg while pin 2 goes to the bottom bit on the board is this correct.