It is quite easy. You will fill pour the fluid into the same hole the fluid test stick comes out of. I would use a funnel that fits into the hole to avoid spillage.
If it is a manual, then you add lube under the car on the upper side of the transmission. under the hood on fire wall side there is the speedometer cable. you must remove lock down bolt with # 10 socket and lift straight up. that is where you add/check your tranny fluid on a 5 speed. clean first. fairly simple.
pull out the dipstick, put a small funnel into the dipstick tube and add until its between the hot and cold marks on the dipstick with the engine running. if you've drained the fluid, start by adding 4 quarts of dexronII, check the level(again, with the engine running) and add more as necessary to get the level between hot and cold.
if you change trans fluid REGULARLY like you should, flushing is not necessary
Find the transmission dipstick near the firewall on most rear wheel drive cars. Yank that bad boy out and wipe it off. The car must be LEVEL, RUNNING, and up to operating TEMP. Wipe the stick off, push it all the way in and pull it out and look at the level indicator. Most people usually smell it as well and although I admit to smelling it myself, it doesn't tell you much and you usually wind up with the fluid on your nose. If the tranny is going bad, you will know it because the fluid turns black in which case the damage is already done. If you just need to add fluid, stick a small funnel in the hole where the dipstick goes and pur it in. Use Dextron III. Hope this helps you out. vbdenny youtube