The manual for this card says “some” cards have power connections. That manual name is SPARKLE-En_color-0227.zip (you can search for it on the Sparkle site). If there is a connection on the card, it is white and similar in size to a floppy drive power connector — BUT — do not use a floppy connector. <b>If you have a compatible power supply</b> (many of the cheaper ones won’t), it will have one specifically for the video card (and not all power supplies do).
AGP card slots can pass some power to the video card, BTW. It may not be enough, depending on the exact model card you bought.