Hello,

You must jack up the car first.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

It has a plug in the side of the transmission case like an old standard transmission. Here is the instructions on how to check the fluid.

Jack the car up level , jack stands front and rear.

Then start the car and put in park (foot on the brake)

Remove the plug and check the fluid it should be at the bottom level of the plug.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken