I think we have here a missunderstanding. What do you want to achive ? Be more specific because I think I do not understand what you try to mean.
EDITED OLHAUSEN: if you are looking for the vehicle crew then you need to create your own one. In vanilla game only Americans and British have them.
I want to create a vehicle crew. In one of the Spearhead mod screenshots they are seen outside the vehicle https://media.moddb.com/cache/images/mods/1/27/26901/thumb_620x2000/fZ4u1c7e.jpg