1955-59 Cab Mounts - Is the front of the cab hard-mounted or Rubber Mounted?

[Maximus]

Hello, I am getting to my cab install and I have a cab kit i bought 6 years ago... you know how these projects go...
anyways, i have pretty much these parts shown in this picture

The square rubber piece i have on the back of the cab, but the front I just have one shim and a thin piece of rubber to set the shim on.
my question is with the round rubber bushing, for some reason when I set up these pieces years ago I have the rubber bushing on the bolt attaching to the bottom of the back of the cab. Is this right? or does there need to be a rubber mount up front as well as the rear?


Thanks!
(if i have too many run-on sentences please let me know so i can try and clarify....)