The inverter is placed differently base on the ULV fogger you have. Make sure that you remove the motor, hose, and the tank. Once the inside cover is empty, unscrew the handle and the switch to unplug it from the wires.

Note: Please handle the wires carefully to prevent any damage. Taking a picture/video of all the parts you’ll be removing helps to make sure that you’ll be putting it back in the right place.

Click this link for a sample video instruction you can follow. It would be a little different depending on your unit.