There is no on off switch. Go ahead and soldier the wires to the esc, than plug them into the motor. If the motor spins the wrong way switch any two of the wires to get it to spin the right way. It also says the same in the instructions for the esc. The esc is easy to setup to get going, if you want to adjust some of the options it gets a little tricky but just read the instructions a few times and it makes sense. Enjoy.

Allen