Mod Chip: On/off switch

[gaving]

Just to add to spookys solution, you need only cut EITHER the wire at pin 1 OR at pin 8 as these are the wires that power the chip (1=V+) (8=V-), then put the switch in between the two pieces of the wire you have cut.
As I have tried to demonstrate below !!!!!

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to pin<_______|---|______>to spot on PCB
switch