Elementor Button and "special" Link

[smochen]

Hi,
I want to use an Elementor Button and need the link : xyz.com target="palais-thermal"
as I work on a Site with an iFrame (="Palais-Thermal") so I want the link to upon in this iFrame.

With a normal link, of course, it works. But how can I add this link to an Elementor Button ?

Thank you, smo