Stumped on thermostat wire

lost the front thermostat control to AC and Heat do to ?? not sure have been in contact with Hartland asking for a diagram on how the wire travel from stat to AC after several emails they pointed me to the brown 6 wire 120v home style wire. when I pulled the controller from the wall it has a gray soft sleeve 4 wire cable and appears to have never connected to brown wire yet appeared to have been cut (thing a squirrel got to it) I peeled back the brown wire ck voltage got nothing lost on what to donumber three.jpgnumber two.jpgnumber one.jpg
 
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