yeah. When you get the 12 volt adapter make sure its got a decently high mA rating on it. After you get the AC
adapter you need to find which wire is the positive one and which is the negative wire, usually the red one is positive and the black one is negative. Once you do that find out which wires on the fans are negative and which are positive. Once that happens then we can start getting to business.
Okay to mkae it simple you are just going to get the positive wires together, and the negatives together as well. Just a note: you're not combining all of the wires together.. just the negatives with the negatives and the positives with the positives. Once you figure that out you can choose one of the following methodes below.. I like the second one the best.
There are two ways of connection wires.. wirenutting.. which takes a wirenut and two bare (stripped of the plastic coating) wire ends (of the wires you want to connect). Take the two bare ends and semi twist them together, then take the wirenut, put it over the twisted and and then twist the wirenut and voila you have a connection.
The other method is the one I like best because its nice and clean and more solid, plus it won't carrode.. sodering. For this you need a sodering set (which is like 20 bucks total at radio shack or any hardware shop. You also need some shrink tubing (the tube that shrinks when you apply a lighter to it. First you slide the shrink tubing onto one of the sides of the wires you want to connect and slide it out of the way. Then you take the two wires (bare ends) that you want to connect and soder them together. After that you slide back the shrink tubing onto where you sodered and apply a lighter to it evenly and letting it shrink around the sodered area, nice and tight. And voila you have a solid connection and no corrosion or trickle possibility.