How to repair bottom diaphragm connection of Eminent Technology LFT8 planar speakers

         "I ordered a conductivity pen with silver ink which looks similar to the items shown above."

          "So I will need multiple layers to build up the connection to touch the bottoms of the 6 screw posts."

           The products mentioned above have a much higher viscosity (they're thicker) than conductive ink or paint.    Then: there's the fact that epoxies are manufactured for binding things together (adhesion).

            A small dab, on each contact point would do the trick

            Personally: I'd use pieces of 3M #06383* (or something thinner), to hold things together.

            Not much of an investment, far as an experiment, before springing for a new panel.

            *https://www.amazon.com/3M-Automotive-Acrylic-Attachment-Black/dp/B000P18N76

           

    

                            Another option:

https://www.amazon.com/gp/product/B00EPYCIGQ/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

                            Perhaps, with even better conductivity (more silver):

https://www.amazon.com/MG-Chemicals-Conductive-Conductivity-8331D-14G/dp/B08K3TG5D9/ref=dp_fod_1?pd_...

        Although: if the original connections were soldered; that would be my first choice, for a repair.

         Desolder the six through-holes, move the contact strip a millimeter or two further up on the diaphragm, to ensure a good contact patch on the (voice coil) traces and resolder through the holes.