Remove the cover from the inverter to expose the wiring compartment board.
Tighten the screws for any wiring system to which the inverter is connected, using your flathead screwdriver on the indicated screw.
Press the "On" or "Off" jumpers, located below the set of screws on the wiring compartment board, to manually turn the inverter on or off.
Replace the inverter's cover when you have completed tweaking the device.