As it turns out (just another factoid should you run into an
Asus Elan Vital case), the arrow and "S" indicates positive.

Maybe the arrow is the same as the arrow on ribbon cables which
indicates pin 1.  The "S" might mean "start" or "signal" but I'm
just guessing.

Thank you Dave for addressing my problem.

I had written:

> > Would the arrow + S on the connector be the positive or the ground
> > side?

David Gillett wrote:
>
>   I've never seen the "S" that you describe.
>
>   The common electrical convention is that the plain black or white
> wire is the ground.  [I have no idea to what extent case manufacturers
> adhere to this....]
>
>   The nice thing about those case connectors is that they pretty much
> fall into three groups:
>
> 1.  Switches, which don't care about polarity.
>
> 2.  The speaker, which doesn't care about polarity.
>
> 3.  LEDs, which won't light if they're backwards, but won't be harmed
> by that either, so you can try them one way and then the other.
>
>   The one exception I can think of is if the case offers an LED "speed
> readout" -- I've seen directions for jumpering these, but I've never
> used a case that had one.

Michael Eisenstadt

                Curious about the people moderating your
                   messages? Visit our staff web site:
                     http://nospin.com/pc/staff.html