[Jesse49chevy]

Guys I have a concern and a question. On my truck I don't have the rear cab mounts that I see on others, when I took it apart I clearly remember only having to unbolt the cab from the two front corners and the center of the rear. I have looked at all of my pics over and over and it doesn't have the rear corner mounts or supports. (as shown on the pictures below from other projects i've seen in here) is this normal? did all trucks not have these supports, should I be concerned about it? Any information will help.
thanks.