I've been working on building my own PC, and I'm trying to plug in the plugs for the front panel buttons. In the manual for the motherboard, it tells me what each pin does specifically, and I know where to put each one. However, for the buttons on the front of the case (which have 2 pins grouped together, I'm not quite sure which way I need to put it in. The only hint I can see is that on the back of the plug, an arrow points to one of the two pins. Would this be the pin that has ground, or something else? If someone can help me figure out what the arrow means, I'll have no issue putting the rest together. Thanks.

No manual was included in the case.

Computers & Internet - Rosewill - R103A ATX Mid-Tower Case