How to correctly wire an on/off toggle

i am using this illuminated toggle for my on/off switch on an amp but i cant figure out how to wire it.

it has 3 legs marked one, two, three. and and the data sheet has this:

i am taking the hot wire from the fuse and connecting it to pole #3.
and i am taking the hot wire from 1 and connect it to the transformer of my power supply but it doesnt seem to be working. there is something i am missing.
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