Our 2020 Plus Six has a single adjuster in its cable, it is a semi balancing inner cable, that is, it connects to each rear caliper handbrake arm and over a pulley on the rear of the handbrake lever. The outer cable has the tension adjustment a couple of feet along its length from the rear caliper on one side ( cant remember which ). I have not had to re-tension our handbrake cable yet, but I have covered the adjuster area with self amalgamating tape to keep any moisture out of the inner. I also grease the exposed cable ends at the caliper operating arm.
