Fitting a restrained switch? i'm replacing a dimmer to switch to a regular switch and just...

i'm replacing a dimmer to switch to a regular switch and just have need of to check the wiring. I hold one red wire and one black rope - on the switch i have two terminal - one L2 and the other is a arrow with a vein through it - which goes into what?
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Answers:    It doesn't event which wire go to which terminal. The switch just make the connection. There are no special components inside that require specific polarity within a standard switch. If you had a 3 or 4 agency switch it would require specific connections.
Does a gfi disable the integral circuit or...
It doesn't make any differences, connect them to the handiest terminal.