2015 Tacoma trd off-road transmission cooler lines

Hi all,

new member. I messed up. Bought this truck used and wanted to change oil. Drained the transmission pan in error. When I realized it was transmission fluid I put drain plug back in but lost about a quart of fluid.

from what I understand I can add new fluid back in thru the transmission cooler lines on the drivers side of the radiator. There are three lines on that side. I suspect the two I need to focus on are lower down on the radiator. Which one do I plug and which one do I feel the fluid thru to?

dumb mistake on my part but would be grateful to anyone that can help. Thank you in advance.

 

https://youtu.be/MldiXuO2IIw?feature=shared

I found it here.

 

Thank you both! I will do it the right way. Appreciate it very much!