How do you drain the oil on a 1999 harley Davidson softail standard?

there will be a large draintube from the bottom of the oil tank ,slipping through and down the frame with a plug at the end this is a flexable tube im guessing 3/4 " in diam. with a clamp securing the plug. simply disconnect plug and remove filler cap and watch the oil drain.the oil is pumped from the tank to the motor.refill through top filler cap..be-sure to replace drain plug ...I hope this helps