dirtydaverj 2017-4-13 19:03 edit
I have recently had to replace my main board and thought I would share in case anyone else that has to is unsure or having problems. The board is only held down by 4 Phillips head screws. Disconnect all plugs, carefully.
Next you have to carefully remove this small board (I used a plastic panel puller so that I didn't hurt it.) For some reason I can't upload images directly in my text so I've attached them. You can get small terminals and wire from Home Depot for pretty cheap. It was under $7 since I didn't have any laying around. One Terminal on the stepper motor/extruder as we've seen and run the other end to the board as done in the pictures I've attached. I have confirmed this spot with the great people at Cetus. Edit: Don't forget to put your SD card in the new board!