How to use PartialView on Edit/Create?

Question

ASP.NET

The essence of the problem:
There are controllers Create / Edit of the Customer model, which has many parameters and an associated Location type. I need to display the Location fields through the PartialView, because not only Customer has Location + there will be Google Maps API scripts (output to the Scripts section).
Issue:
When submitting a form on a Customer model that has the associated Location fields populated, Location = null is returned to the controller. How to solve this problem?
PS
I understand that you can make CustomerView specifically for Create / Edit, but this will spoil the architecture of the project.