Track in reports GotoWebinar

Instead of having both registrations in GotoWebinar reports (?source=) and in Google Analytics track it with e.g /thank-you-page I want to collect everything in GoToWebinar. How is this possible with this plugin?

Before I added this plugin I tracked all registrations through the website with a cookie script and defined from every source with:

?webinar-campaign=email-lime-crm-2016-08#events Where the cookie follows the “webinar-campaign” on the page #events and the definition is from e-mail Lime CRM and the date. This works.

But now they are not transferred to the GTW-link.

Any ideas or solutions to track everything in GTW with this plugin?