I will try and dig out an image for you but for reference the drain and fill bolt are located at the rear of the transmission above and below on the outer side of the differential. Basically, where the drive shaft CV joint connects to the gearbox you should spot them easily, loosen the top 17mm bolt first and with a 3/8 insert you can crack open the drain bolt. You will need approx 2L of fluid but get 3L just in case. If the transmission fluid hasn't been done before I would suggest a better fluid than the Honda MTF-3 p/n: 0826799902HE, The Castrol Transmax Manual Multivehicle 75W-90 fluid would be my choice with the higher miles.😏