Using a #2 Phillips screwdriver, remove the two screws (circled in yellow in the first image) holding down the speed/motor control assembly.

Slide the board over slightly to to allow the black support at the top of the board (circled in blue in the second image) to slide through the notch in the board or remove the support with a #2 Phillips Screwdriver.

Flip the board over to access the power connector (circled in green in the third image).

Remove the power connector by depressing the tab on the edge of the connector (circled in purple in the third image) and pulling upwards.

The speed/motor control assembly can now be removed and placed to the side.