bcavnaugh...I am not finding where on the GTX 680 Classified Video to plug in the cable.
Newer 680 Classified videocards do NOT have the EVBot connector due to nVidia restrictions: at first they had it, then nVidia released a statement restricting some things and ordering EVGA not to include the connector anymore.
Anyway, you can buy the connectors (eBay) and solder them in its place, it works just as great as if it came already installed by EVGA. I have a 4-WAY SLI setup, and in one of the cards I had to go that way, buy the connector and solder it because I bougth that fourth card after nVidia's restriction date =)