I purchased 2 g4 edition 1 mags off eBay along with a cap. There’s enough to cobble 1 decent mag together, but I ran into a stumbling block that I didn’t realize in the pictures when purchasing. My cap does not have any contacts in them. I watched a video of a rebuild of one and took a screen shot of what I’m talking about. The cap has 4 black contacts where the rotor touches when it rotates past it. What are these called, and how do I get them for my cap? 

 
Magneto Rx: - Eisemann - G4 - G4 Early Version - Silver Star Equipment LLC Store (oldcroak.com)
maybe have parts -  Eisemann G4 Magneto Brochure (oldcroak.com)