What is the usual setup for a 3 channel setup? and/or a 4 channel setup
(like where are each of the servos located and what are they connected to on the plane?)

THANK YOUR FOR YOUR HELP!!!!
~Mike~

3 Ch is Rudder elevator and throttle usually. The 3 servos are usually mounted inside the fuse near the cg under the wing with pushrods connectiong to the elevator rudder and carb.
4 Ch is Rudder, elevator, ailerons, and throttle usually. The 3 servos from above are commonly in the same location, with the servo for the aileron in the bottom center of the wing. Pushrods go from either side of the servo wheel or arms to the aileron torque rods. Another common setup places 1 servo in each half of the wing. Each servo connected via pushrods to one of the ailerons.
-John

If this is for the plane u posted below, might I recommend you find a club in your area and stop buy it. They will be able to give you hands on and eyes on examples.
-John