Steering in 1, throttle in 2 and off you go. The other channels will take a receiver battery or booster, and your PT, but it doesn't matter which is which.
Mine was perfect - bound first time, finds the Tx signal as fast as the 603 when you switch on, and reacts exactly the same as the 603. Mine's in a 12th which will find any response or interference faults very easily and so far nothing untoward to report. I've got one aerial running up the aerial mast, and one taped to the chassis - the aerials should be at 90 degrees to each other when the car is viewed from the side.
So far an excellent piece of kit that works, and costs a fraction of a Futaba item. I'm very pleased. HTH