1) The rear comes with two panels - one with the tarpaulin support frames and one without. The stowage is for display only.
So they will not be attached on the final product.
This is good news!That is one of the many reasons I like about Rubicon Models. The plastic kits give they you are "clean" vehicles leaving it up to the gamer/modeler to add the extra stowage as needed. More importantly, because Rubicon Models lets us start with a clean vehicle (not already cluttered with add stowage), we can individualize them so that they naturally look different when we buy more then one of the same model kit. To repeat what ripley said, "Look at the resin Sherman DD Warlord produced, no way every tank in the unit would have gear placed exactly like that."
At 1:56 scale. vehicles will look strange and weird if all the vehicles had the exact same stowage in exactly the same places. This is why I think Rubicon Models made an excellent decision. They give the gamer/modeler a model of a vehicle that is "clean", and offer stowage kits to customize the model as needed. Also, sometimes in the kits themselves, they add extra stowage that can be added or not added. Simply fantastic!