You'll need to remove the fan screws on the top, remove the screws on the botton that hold the 2 heatsinks together, then use a soldering iron with a small tip to remove the + and - wires from the circuit board.  They are easy to remove, just touch the joint with the iron and the wires will pop off.

Temps are fine, I'm still getting 0% HW errors.  Note only do this if you plan to run the units in Scrypt mode only.  If you run in SHA256, you will need the fans!