Voltage is split and current doubles when loads (i.e. fans) are in series. Voltage is shared evenly when parallel loads are connected. Join the extra fan's wires to the same cables that the original controlled fan was on.
Alright cool, thanks alot for all the answers, I'll get some of those splitters.
Silverion77, the max amp per channel is 1amp, and the fans are 12v,so I should be fine with 4 fans, right?
Thanks alot for the help everyone.
The fans say 0.24A (Max.) and 2.88W. So I should get away with 4 per 1A channel right?