I need to add transmission fluid, where is it that I do this, exactly. on 2003 Lincoln Aviator

I have looked and can't find where to add the transmission fluid. Please help! I need to add transmission fluid, where is it that I do this, exactly.

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3 answers 1 comment
The transmission is filled through the drain plug. The drain plug is two parts, and the inner is a plub. The outer has a 'tube' into the pan. Fill through the inner with the plug removed. Once it starts spilling out stop filling and insert the plug.
Where is the plug locketed
the 2003 Aviator has a sealed transmission, I had a flush at 150k, but it really has not changed anything. Transmission shifts hard at 2nd and 3rd gear sometimes.
sounds like you might have a sealed transmission and u would need a trans flush machine to add fluid