* Automatic Transmission: The fill location is on the side of the transmission itself. It's usually a small bolt or a dipstick, but it's crucial to consult your owner's manual to be certain. There's no single universal location, and visually identifying it without the manual is difficult and risky. Filling through the wrong port can cause damage.
* Manual Transmission: Manual transmissions don't typically have a separate filler plug or dipstick. The transmission is filled through the gear shift lever or a side-mounted plug, but again, refer to your owner's manual for the precise location and procedure.
In short: Find your owner's manual. This is the only reliable way to locate the transmission fluid fill point. Attempting to find it without the correct information could result in damage to your transmission.
