Where is the cabin air filter located?

If it has one installed, you should find the cover for it in the footwell on the passenger's side. Remove the cover, slide out the old filter, check the direction on the new filter. Slide the new one in and put the cover back on.

The diagram is the whole engine outside of the car. I need to see where the filter cover inside the car is positioned and what it looks like?

That image is the heater assembly that mounts behind the dash. The filter is the piece that is marked #2 and the cover is #3. They are visible if you look to the left with your head in the right side footwell. That is the only image of it in service information. The instructions say, remove cover, remove filter. Reverse the process to install new filter.