Behind the battery is the dipstick. Check the fluid level and use a long tapered funnel to add the correct amount of fluid through the dipstick tube. add slowly checking a few times between adding!
You should not have to add fluid unless there is a leak or it was under-filled when last serviced.
My friend put the finger in the hole past the threads and he said I need fluid not only that my car keeps popping out of gear when I'm driving on the freeway or whatever so I'm thinking I need transmission fluid how do I add it somebody please tell me
Automatic or standard transmission?