I am looking for a structure that will ensure ground potential and continuity with the antenna rods.

In this prototype, PogoPin is inserted in the core on the SMA side, while spring pressure ensures a secure contact point,

We inserted a cermet of M3 size into the opposite side of the GFRP guyliner, cut a thread through one side of the antenna pipe from the side, and screwed in an imo screw to apply pressure in the opposite vector from the PogoPin.

The result was good, and the situation where continuity was still unstable was cleared up.

When fixing the extension to the connector, we “glued” the extension to ensure strength, which resulted in a high probability of insulation. In that case, we drilled a hole in the side of the extension and screwed in an M2 size bolt all the way to the connector’s outer surface to ensure continuity with the GND.