There will be a combination of channel reversing, interchange of channels, etc. that will work. since different brands of servos work in different directions with the same input (and the control horns can be either on top or bottom of the surface) no one can give you exact instructions. However, experiment a bit by trying to reverse one or more channels, interchange connectors, reverse one or both channels and eventually you will find the combination that works on your plane with that brand of servo.