Alright, i'm new to relays and I have the wiring diagram I need (6th one down, Connecting Additional Devices to the Remote Turn On Wire):

http://www.the12volt.com/relays/page5.asp

The problem is I don't know how to wire the fans themselves. The diagram just shows the fans connected to the relay. Any help on where the (+) and (-) need to go from the fans? Thanks.