Publishing a worksheet that uses modules

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I wrote a worksheet in the Sage Notebook. Since it was large, I split it into several modules. So now my worksheet looks like this:

load ("/home/erelsgl/git/myproject/ClassA.sage")

... Do some things with class A ...

The file ClassA.sage looks like this:

load ("/home/erelsgl/git/myproject/ClassB.sage")

... Define class A based on class B ...

This works on my computer, but of course it will not work when I publish it on the cloud.

What is the correct way to write my notebook and its modules such that it will be publishable in the Sage cloud?