How to connect power on switch and LED on TA2024?

[gychang]

I am a novice but with basic soldering skill and willing to learn.

I am trying to hook up non-illuminating power on switch ((A), has 3 prongs one with "copper" which I assume is ground) and a separate power on LED bulb.

1) is the picture correct to connect A to the board, B is obviously DC input.

2) do I need a extra resistor to connect the LED? (some web site suggested LED must be used with a resistor??)
3) does the polarity matter, one has a longer "leg".
4) can anyone direct me where to solder the LED on this board so when I switch A on the warning light comes on?

thanks,

gychang

[audio1st]

If it is a non illuminating switch.

[gychang]

Originally posted by audio1st
If it is a non illuminating switch.

thank you, thank you.

You have been a tremendous teacher with your clear pictorials, this is another. Even drew in a longer leg on LED...

What is the third "copper" lead for?

gychang