The transmission dipstick is located in the engine bay, near the back of the engine. It is a yellow or orange plastic handle with a metal dipstick attached to it.
How to add fluid:
1. Park the car on a level surface.
2. Turn off the engine and let it cool down for a few minutes.
3. Open the hood.
4. Pull out the transmission dipstick and wipe it clean with a rag.
5. Reinsert the dipstick into the transmission and pull it out again.
6. The fluid level should be between the "FULL" and "ADD" marks on the dipstick.
7. If the fluid level is low, you can add fluid through the transmission dipstick tube. Use a funnel to add fluid slowly, and check the level frequently to avoid overfilling.
8. Once the fluid level is correct, reinsert the dipstick and close the hood.