Transmission Fluid ?

Ok i have my flamesuit on for this stupid post..lol I went to change the oil for the first time on my 02 tacoma. I found a plug underneath (middle of truck), thought that was it, drained it and realized it wasn't OIL

So just a tab up from that plug, I found the actual OIL plug and proceeded to change the oil and filter.

Now I just need to confirm what liquid substance it was that I drained the first go around, trasmission/power steering? There was about 3-4 quarts of this liquid, so Im assuming tranny fluid and if so where do I locate the place to refill it.

Need some help on this one please, thanks

 

Right back side of the engine bay, is the Auto transmission dipstick, you fill it through the dipstick tube, you need a small funnel. Dextron 3 Transmission fluid.

 

x2....dont sweat it your not the first to do this.

 

Thanks Guys for the help