To link the Master Data you uploaded to the a specific Source please go to the website:

https://emvo-iqe.meliorsolutions.eu

https://emvo.meliorsolutions.eu

Then Admin > {choose your organization} > {scroll down} > Search for the Master Data in the Master Data Board > on the Master Data row there is a blue icon called "edit source links" > in this section you will be able to link the Master Data to sources