where do you set production levels?

I have 2 different cars, but I can’t find the screen/button to set production levels individually. I’ve seen it in a video, so I know it’s there. : )

Its on the Chassis Assembly Slot / Front Axle Slot.

Click on Change, and that second window pops up, where you go to the bottom and select which model you want to add
These are older screen shots, but its in the same location

Ahhh, thank you. I just found it and was trying to delete the post. I swear I had already looked there. Wife would not be surprised.