I looked at your PM and see where you have a saltwater pool... So here is a pic that shows the large transformer (SWCG) connecting to the Pump Filter relay.. This set up is configured for 240 volts..
Notice that two wires for the 240 come from a Circuit Breaker and go to the Line side of the pump/filter relay.. Then the yellow and white wires from the SWCG transformer are connected to the Load side of the same relay. The Black and Violet wires are connected together with a wire nut.