Where is the intermediate car?

https://preview.redd.it/1uuwppmksd5d1.png?width=716&format=png&auto=webp&s=eadabf5811e33e7618bd7cbdb1b3024622ae4824

I tried using the Japanese EMUs from this one NewGRF I found (can't remember which one because I have several) and I am only able to purchase a cab car? Where are the intermediate cars?