recently I bought a bunch of case fans and a laptop cooler pad with hopes of connecting all the molex connector and powering them up with a 12v molex ac/dc converter. I got all the necessary mats for my laptop cooler but the molex connectors cant run a train on each other like my case fans from my desktop. the fans have a 3 pin connecter and a two prong molex connection. is there any way i could just cut off all the molex connecters and attach all the black and red wires together (color coordinated) and power them up? also there is a third yellow wire stopping at the three pin connection my step dad who is an electrition was wondering what it is, any ideas?