Exchange windshield at the 1979 Camaro, question on antenna connection and Carglass

Hello, with my 79er Camaro I would like to change (let) the windshield (with disc antenna) this year. I would like to see how the antenna cable is actually attached to the disc. At the front I can see that the cable is somehow attached to a contact point. Is this soldered on the disc, or is this a kind of contact area where the new disc is simply put on? As I understood (information from the US parts dealer) is at the new sc And then I read the carglass changing windows with OIdtimer. Has anyone ever had that done there? Can they do that? I thought that because they also offer the disc exchange at a home would be an alternative.