google analytics – Which Adwords campaigns brought the user to this regex URL

My clients' site can not be modified to track the goals, the platform they use does not allow it and the developer has no interest in coding anything to help.

I arrive on the site late in the game, but Adwords and Analytics have been linked for some time. All I need is to get a report on the Adwords campaigns that generate leads. I can determine which ones do this by looking at the URLs, if they contain? Find out about the user who sends a contact request.

How can I create a report that will show me where this whole set of users comes from? Which adwords campaign, or direct / organic search, etc.

Thank you!