Cutting the original wires
As you probably noticed when you separated the back and front pieces, there are quite a few wires trailing around the inside. The back of the control panel of the washing machine (at the top of the front piece) is the gathering point for them all. The actual circuit board is concealed behind a kind of plastic box, but that's okay because we don't need to touch it.

There are 4 things connected to this control panel, with two wires for each of the things:
- The drum motor
- The batteries
- The door switch
- The speaker

There is actually only one thing which you MUST disconnect the wires from, and that's the motor. I suggest cutting them at the motor end rather than near the circuit board, because if you ever want to re-connect the motor to the circuit-board (to make it not computer-controlled), then you can easily (because there will still be the motor's wires coming from the circuit board).

This is a view from the inside, of the front piece. It shows the end of the cylindrical block, where the main pulley for the drum is.

The motor (A) is on top of the cylindrical block behind the drum, on the front piece of the machine. There's a drive belt between the small ring on the motor to the large ring on the reduction pulley (B), then a larger drive belt goes from the small ring of the reduction pulley to the main pulley on the back of the drum. You'll need to remove both of them. Make sure you don't lose them though, since we'll be using the bigger one with our new motor!

There is a little white piece of plastic which is for attaching the hand crank to. The white piece of plastic is pushed over a hexagon-shaped design on the main black pulley. You can easily pull this off the pulley - in fact, it might fall off when you pull the front and back pieces apart. I suggest that you do, because the drum will turn with less rattling noises as the white plastic won't be scraping on the inside of the hole for it on the back piece. It won't put any extra strain on the axle between the main pulley and the drum, either.

Once you've disconnected the old stuff, we're going to put in the new things! --> Section 5 - Adding new parts