i had one that i got earlier but its from a later model.
almost everything is working but i have.
#1. a single brown female bullet from the harness,
#2. a male six connection block from the harness.
#3. a female nine conection block(uses only7 wires from the tacho).
#4. a female three connector (2 wires black/white trace and green/black trace)
#5. a female three connector (2 wires white and red/grey trace)
#6. the front brake swith lamp wire bullet style (black/white and orange)

now i have the nineway block conector from the old harness i am asumeing that goes to the tacho and i need to get a sixway female conector and wire it to match the new harness.

i was expecting to have a couple of spare conections as the 73 does not have the gear poss indicator.
please be gentle as i am in electrical kindergarden
thanks mark.