It's backwards. The A2000 is designed to pull in fresh air through the vents at the front of the case, across the cards, between the drives, and blow it out the back. Replacing it doesn't require any soldering, in fact it can take a standard 80mm PC power supply fan. Just unscrew and stick it in. The connector is even identical, although the cord on PC PSU's is typically a lot longer than needed for inside the A2000 PSU. Only caveat - the two wires on mine needed to be flipped, since I guess the "standard" was reversed, sometime between A2000 days and modern ATX specifications.
Obviously you'll want to observe standard electronics precautions of not poking your screwdriver into anywhere it doesn't belong. :roflmao:
