Electric fan wiring(flex-a-lite)?

[RoadWarrior]

Ill take a stab at it. though i think you could do it a couple ways. The only thing im unsure about is the switch because i dont know how it was wires up before. So ill just assume the switch is a master control and allows the thermostat to work.
Ill start with the switch:
Depending on how the switch is lit im guessing that 2 wires are ground
the third goes to the - wire on the thermostat
then from the + wire on the thermostat you run wires to the +'s on both fans
and the -'s from the fans will just go to a chassis ground.
As for the third wire on the thermostat it could be a couple things depending on the switch and sensor
it could be a wire going to a temp sensor or it could go to the switch as an over-ride. if you can remember how it worked before i might be able to help more.
Hope i helped a bit