i bought a new energy saver spa pack for my hot tub , everything hooked up but i can not get the heater wires to connect properly it don’t plug it there are screws for it , the wires on my heater are green and yellow , blue , and brown i am unsure the order they should connect on my spa pack it is a 110 plug and play hot tub please help i would like for it to heat as well and just work. thank you