For automatic transmission:
remove transmission dipstick, put fluid in dipstick tube with funnel. be careful not to overfill.
under the car directly in gear box
in the transmission fluid reservoir under the hood
the transmission dip stick is red, you use funnel to put fluid in there
in dip stick tube
The fluid goes down the dipstick tube.
You add fluid at the same place you check it.
as long as it is an automatic transmission, you put ATF in
down the dipstick tube
you have to put it in the dipstick hole.
You wouldn't want to do that because starting with the 2002 model Ford Explorer ( four door ) there is no automatic transmission fluid dipstick / dipstick tube that would allow you to put in automatic transmission fluid at home
Mopar ATF+4
Down the dipstick tube.