u/Briango

I'm not sure if the new heater being shipped to me comes with a 3 wire power cord or not. If it does I will need to remove the 3 wires from the old heater from my control panel. Two of the wires are pushed into this grey control board socket. I'm assuming that to remove them I push a small screwdriver into the rectangular gap above the wires and then just pull them. Is that the correct technique?