Two T8 screws hold down the cover over this. The blade connectors have a little tab lock that must be pushed while pulling them apart.

The black wire is for the temperature sensors.

The white wire is for power (disconnects near the base, under a woven sleeve that slides out of the way. You don't need to touch the heatsink). The servo connector pulls apart easily.

The arrows show the 4 places to disconnect the wires so you can separate the top from the bottom. The white connectors under the sheath may also have a tiny lock tab that you need to push in while pulling them apart. Make sure to take note of how the wires run before take off the cover.

Make sure to mark the black wires before disconnecting so that reconnect them correctly when putting it back together. (Photos in reverse order).