Welcome from western NY and happy quilting
I don't have your frame, but I used to have QCC. One of the encoder wheels attaches to the side to side carriage and the other attaches to the back to front carriage. The side to side encoder will ride on the long rail. Since I don't know your frame/carriage... the other has to attach to the bottom of the back to front carriage and ride on the top of the side to side carriage. I hope that helps a little. You might want to search Yahoo groups and see if there is a support group for your frame.