A little clarification (I had a tech article on here about this but can't find it now): some transmissions do have fill hole on the side (and therefore a "check" hole too), others have a a fill-hole at the top of the transmission. You may have either transmission, regardless of what year your car is because someone could well have swapped transmission along the way. In any event, if you can't find an obvious side-fill plug on the transmission feel around the top of the transmission for a dipstick that is located just forward of where the radio is in the car. You should be able to run your fingers along the top of the transmission there fairly easily.
If you have a top-fill transmission you'll have to work from inside the car - the dipstick (and fill-hole) is located behind the radio under the dash. You can get to the dipstick by carefully peeling the carpet back from the console (being careful not to break any plastic), then pull the soft rubber seal from the transmission tunnel directly behind the radio. The dipstick can be pulled up through the hole and checked (you may need to coax the dipstick up from the bottom through the hole, some people tie a string or ribbon onto the dipstick to make it easier to pull out later).
Either type of tranmsmission can be filled using a oil/fluid pump available at any autoparts store for a few dollars. The pumps screw right onto the top of a bottle of oil and look like something you find sticking out of the top of a huge ketchup bottle at a hot-dog stand but with a hose attached to it. For filling the top-fill transmission just line your carpet with newspapers (including the area around the console), push the hose into the hole and pump slowly. The side-fill can be done from under the car. Either way the pump will finish the job without spilling any oil.