wirng the lionel substituet 2305-45 fror a 455-92 oil derrick heat switch in the older 455 oil derrick

I have an older 455 oil derrick that the thermostatic heat switch is broken.  I was told that the new ccircuit board part number 2305-45 would work better than the old switch.  But have not been able to find the correcdt way to wire it in place of the old switch.