Any of the 11-pin plugs where all 11 of the pins are used will suit the dual brake light set up. As I said for HJ pin 'J' will be vacant.

It is interesting that in some of the those pics, pin 'H' has a brown wire & for some its almost pink. Both HX & HZ wiring schematics list it as 'tan'.

This might have changed when they went from the single pin brake fail switch to the 2-pin version (around March/April 77). Either way this makes no difference to the dashboard wiring.

Dr Terry