How Can I Use BodyMovers On an Object With Multiple Parts Welded To It?

I am making a game that involves remote controlling vehicles. These vehicles are not singular parts; they are parts welded to other parts to form aesthetically pleasing appearances. When I tried inserting a BodyThrust into the main part, it simply wouldn't move. I double-checked to ensure that all of the parts are unanchored.

I suspect that the problem is that the parts surrounding it do not have BodyMovers, so they are blocking its movement in any direction. How can I get around this? There is no actual script here, by the way; I will make a script when I understand how to make these vehicles move with BodyMovers. Right now, I'm simply trying to get how to make them move before actually scripting their movement.

Is there any way I can fix this? Or is there a way of moving the vehicles that is far more practical that I don't know? (These are RC cars; controlled from a distance, not a player sitting within them.)

Any and all help is highly appreciated!