I'm going to guess that the a.bog0, a.bog1, a.bog2, and a.bog3 points got renamed, and the car is relying on there being an a.bog2 and a.bog3 for the couplers to "spawn" from.
I'll further postulate that what I will need to do is make an a.bog2 attachment point mesh, and an a.bog3 attachment point mesh and attach them to whatever the originals were renamed to.
I was able to do this before and it worked (in that case it was making an a.outsideviewX, a.drainX, etc. when when it was attached to the mesh gave me an outside view just as if it were in the original mesh file).
I'll find out tomorrow and report my findings - if anyone else has an idea (like how to re-rename the points) I'm all ears, errr eyes...