ORIGINAL: madmorgan
typically port 1 is usually throttle then 2 is right cycic servo 3 is elevator 4 is the 3 wire from gyro 5 is the single wire from gyro 6 is the left cyclic servo but you can use a servo to plug into each and move your stick and figure out which 1 is which but make sure your motor wires are unplugged and you have rx powered up and bound to tx
That would definitely work if the OP had a Spektrum or JR radio. I know for a fact that Futaba plug assignment is different.
The suggestion to look for the Finless' Videos is a good one, as is the reading of the manual that came with the radio. Letting us know what kind of radio we are talking about is also a good piece of information to have.
Rafael