If you hook up the wires wrong USUALLY you wont damage anything. Here are symptoms of stuff hooked up wrong
1) Dish moves east when told to move west= actuator (thick wires) hooked up backwards
2) can only view 1 polarity= polarotor servo motor wires not hooked up properly or bad servo
3) try to move dish and get a NP or No Pulse on the reciever display= actuator motor sensor wires not connnected properly
Good Luck :-D