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Now you have successfully identified one switch with one bolt, let's say switch 1 connects with bolt 1 and you have unplugged bolt number 2, all you have to do is to identify the two remaining switches.
Go to switch 2 and unplug one of the two cables from the switch and connect it to the bolt, touch the other side of the bolt with the part of the switch where you've unplugged the cable and turn on the switch. If the bolt you're holding is lit then it means that switch 2 connects with bolt 3 (and switch 3 with bolt 2) else switch 2 connects with bolt 2 (and switch 3 with bolt 3)
Don't know if this solution is already posted before...
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