I have 240V Fahrenheat (model 30054)baseboard heater and a model FTA2A double pole Thermostat . The heater has two black wires while the thermostat has red wire(L1)into a sw & out a black wire to the heater (per wiring diagram).Also another red wire(L2)into another sw & out a black wire to the heater (per wiring diagram). How do I connect??