Asp.net- sql Database connection between two servers and web forms created in separate projects

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C#

ASP.NET

I have created a website named car and connected to the database which stores and retrieve information from sql server xyz.

my another friend developed a separate website named spare parts and connected to the sql server abc.


now I copied the webpages from spare parts and pasted into cars and rebuild the solution it's executed successfully.

But the problem raised when it stores / retrieve the data from sql.

I have connected to the sql server abc to the website car but still it's asking me to configure for each sql datasource .

Is it that I need to configure each datafield or Is there any way to make it default or automatically the connect configure data source?

server error -

The connection name 'xxx_xxx_xxxx' was not found in the applications configuration or the connection string is empty.