Let's say I have a Billing website(1st website) for clients where a client makes an account and buys a plan.
Then what I do is create a website(2nd website) for that client's shop where his employees and his other customers register and use it.
So what I want to do is to say the following in the terms of 1st website:
"the Product, the Services, the Website -> refers to both sites".
Is it legal to do that ? If so how do I mention 2nd site as "the Product", "the Service" in the 1st site's terms.