[Tom Wesenberg]

It doesn't matter which wire goes to each terminal.
The only time that matters is when using some of the bad repro switches that were sold.
They were so poorly made that one contact hit the case in the off position, so if the power wire connected to that terminal, the fuse would blow. Put the power wire on the other terminal, and you'd never know you had a junk switch. I've seen this twice on repro switches.